,,the ,,american ,,journal ,,of ,,photography4 ,illustration3 8,,folwell',s ,,washington40 ,,negative ,,from ,,original4 ,,by ,,julius ,f4 ,,sachse4 ,,american ,,journal ,,of ,,photography4 ,published by ,,thos4 ,h4 ,mc,c,o,l,l,i,n ,,co4 ,,vol4 ,,xi4 ,,philadelphia1 ,,july1 ,,no4 #g #ahij4 ,,thos4 ,h4 ,mc,c,o,l,l,i,n1 ,managing ,editor4 ,j4 ,f4 ,,sachse1 ,associate ,editor4 ,,the ,,silhouette4 ,our illustration1 8,folwell's ,washington10 is a profile of the one person characterized in our nation's history as the 8,first in war1 the first in peace1 and the first in the hearts of his countrymen40 ,our object in presenting this frontispiece to our readers for the current month is a two-fold one2--first1 in view of the ,eleventh ,annual ,convention of the ,photographic ,association of ,america1 which is to be held in ,washington1 ,august #ab-ae4 ,the subject is a particularly appropriate one4 ,the original portrait was painted by ,folwell1 in #agie1 while ,general ,washington was in the presidential chair1 for ,col4 ,william ,washington1 a kinsman of the ,general1 and who in the year #ahjj1 but a short time after the ,general's death1 presented the portrait to ,james ,henry ,stevens4 ,the following endorsement is written on the back of the picture3 8,done #agie1--,presented to--,james ,henry ,stevens1 ,esqr41--by his friend ,col4--,wm4 ,washington1 ,sept4--#ith1 #ahjj--,said to be a--,correct likeness from life of--,his ,excellency ,gen'l--,george ,washington--#ast ,president of--the ,united--,states of ,america40 ,the original is now in the possession of the ,historical ,society of ,pennsylvania1 and is classed among what are known as 8rare ,washington portraits40 ,in ,mr4 ,wm4 ,s4 ,baker's list we find on page #aji the following notice regarding the portrait and the painter4 8,samuel ,folwell1 #agie1 miniature painter1 of whom little is known1 was practicing his art in ,philadelphia1 the latter part of last1 and the beginning of the present century4 ,the profile of ,washington in possession of the ,historical ,society of ,pennsylvania1 inscribed #8,s4 ,folwell1 ,pinxt1 #agie1' is said to have been taken upon a public occasion1 the ,president being unaware of the fact4 ,it is drawn on paper and solidly painted in ,india ink1 with certain lights touched in1 and as declared at the time is #8certainly a most spirited and correct likeness4' ,there is no engraving of this profile40 ,in addition to this portrait by ,folwell1 there are in existence two regular silhouettes of ,washington4 ,one was taken by ,samuel ,powell1 an ex-mayor of ,philadelphia1 by tracing on the wall a shadow thrown by an ,argand lamp1 which had just then been invented4 ,this picture is now in the possession of the ,massachusetts ,historical ,society4 ,the other1 a psaligraph1 or silhouette cut with the scissors1 by a ,miss ,de ,hart1 of ,elizabethtown1 ,n4 ,j41 in #aghc4 ,it will be noticed that the portrait belongs to the more advanced type of its class2 viz43 where an attempt is made to introduce detail by the use of the brush4 ,our other reason for reproducing this portrait is owing to the fact that the solid profile has of late again attracted considerable attention in photographic circles of ,europe1 and strange to say much difficulty seems to have been experienced in obtaining desirable results4 ,as simple as the production of a solid profile seems to be 7and is to us in ,america7--if we may credit our ,european exchanges--just so difficult has the process proved to some of the camera artists beyond the sea1 as will be seen from the accounts here given4 ,on account of the extreme plainness and simplicity of the old silhouettes1 we are too apt to pass them by as productions of but little or no artistic merit or value1 overlooking the fact that the plain outline contour1 in centuries past1 was the germ from which emanated the arts of bas-relief and portraiture1 the latter passing through all the various stages from the plain outline of the finished miniature1 and these in their turn to be supplanted by photography of the present day4 ,there are two traditions which have come down to us from the dim ages past relating to this subject4 ,one informs us that it occurred to an old ,greek to follow the contour of a friend's shadow with a piece of coal as it fell upon the white marble wall of the temple1 thus permanently securing the outline of his friend's features2 from this incident is said to date the ,greek ,school of ,painting4 ,arkides1 of ,corinth1 and ,telephanes1 of ,sikyon1 improved the process by filling out the space between the lines with a piece of coal or ruddle 7an argillaceous iron ore71 from thence the transition to pigments was an easy and natural one4 ,the other tradition1 a still more pleasant one1 would have us believe that about twenty-five hundred years ago there lived in same city of ,sikyon1 in ,greece1 a modeller in clay by the name of ,dibutades4 ,he had a daughter ,kora2 he also had a young apprentice4 ,as usual in these old tales1 both were young and fair1 and in the course of events vows of betrothal were exchanged4 ,shortly afterwards1 as the pair sat together1 ,kora suddenly seized a piece of coal from the brazier1 and asking her betrothed to remain still1 she traced upon the wall the outlines of the face which was so dear to her4 ,it was an inspiration on the part of the ,greek maiden1 and so correct was the likeness that when old ,dibutades saw it he recognized it at once1 and thinking to please his daughter1 he filled in the portrait with clay2 the result was a bas-relief1 the first that was ever made4 ,as crude as the silhouette appears1 it certainly was the best process1 prior to the advent of photography1 to reproduce the features of persons2 this applies1 however1 more to such as had a marked or prominent profile1 the result almost always being a recognizable portrait1 while in subjects with soft harmonic lines1 especially female faces1 the identification of the original by means of the silhouette1 or profile1 was more or less difficult4 ,yet there was a time1 we will say in the century preceding the perfecture of ,daguerre's invention1 when the silhouette was popular and common as the carte or cabinet photo of the present day4 ,it was about the middle of last century when the rage for profiles broke out in ,france4 ,it is said the style was introduced by the ,pompadour1 then at the zenith of her power4 ,be that as it may1 it struck the popular fancy1 as it was a branch of portraiture which came within the reach of all classes4 ,paris was soon flooded with profile artists1 and the black profiles became known as 8 la ,pompadour40 ,with the decline of her power1 and the appointment of one ,etienne de ,silhouette as ,minister of ,finance1 who on account of a system of retrenchment inaugurated by him had become an object of derision with the court favorites and the populace1 a reaction set in2 and so great a butt had the ,minister become with the populace1 that everything that savored of retrenchment1 or was cheap1 poor1 or shopworn1 was 8 la ,silhouette40 ,our profiles1 on account of their inexpensiveness1 came under the same category1 and strange to say thus immortalized1 for all time to come1 the name of the honest ,minister of ,finance4 ,towards the end of the last century the art of profile painting reached its highest development1 of which our example is a good specimen4 ,in our own country1 the demand for these pictures was so great that a special machine was invented for the purpose of producing correct outlines in miniature4 ,this apparatus was one of the features of ,peale's ,museum1 then in ,independence ,hall4 ,the process was first to outline the shadow1 then the machine was brought into play2 this consisted of a tracer1 which moved on a universal joint on the standard1 the respective ends being adjustable as to length1 so as to suit the required relative proportion between the shadow and the miniature copy4 ,in using1 one end of the tracer was caused to follow the line of the profile1 while the other marked upon the paper which was presented in a frame4 ,the paper was then removed1 and the portrait cut out by the scissors4 ,the silhouette portrait also came into vogue for book illustrations1 and specimens from copperplates are frequently found in old volumes4 ,towards the close of the last century the silhouette for a time was superseded by pastel portraits4 ,however1 it was not long before the art was again in favor1 and practiced by numerous artists4 ,the brush1 which had heretofore been almost exclusively used1 was now supplemented by the knife or scissors1 resulting in the art of 8,psaligraphy10 in which the portrait was either cut out of glossy black paper and then pasted on a white card1 or the reverse1 where the outline was cut with a knife from a sheet of white paper and then backed with a piece of silk1 thus showing a black profile on a white ground4 ,specimens of the latter process are very rare1 as it required an artist of no mean order for their execution4 ,owing to the popularity of the silhouette it soon became elevated to the rank of meritorious art4 ,noteworthy among the exponents of this school we will mention the late ,paul ,konewka1 ,strhl1 and others1 who produced effects of a surprising degree of naturalness in solid black4 ,half a century ago silhouettes of prominent persons1 actors1 danseuses1 soldiers1 orators1 etc41 were as common an article of commerce as the photograph of a professional beauty is at the present day4 ,the advent of photography eventually proved the death blow to the silhouette1 as a picture with all the detail and expression was far preferable to the simple profile4 ,yet at first1 in many cases1 on account of poor posing or defective lighting1 the photograph showed less similarity to the sitter than the well-executed silhouette4 ,at the present day1 with the great advances in the photographic art1 all necessity for the silhouette has ceased to exist1 nor is there any special reason why that style of portraiture should be made by use of the camera1 except as a pastime4 ,yet1 strange to say1 this subject has excited so much attention in ,europe that it was made the special order of business at the ,april meeting of the ,photographische ,gesellschaft1 in ,vienna1 where ,herr ,eisele1 a prominent member1 stated that he had experimented for the last two years in producing photographic silhouettes4 ,professor ,luckhart and the artist ,herr ,schuer had also devoted much time to the subject without1 however1 succeeding as well as the first speaker4 ,the details of ,herr ,eisele's experiments certainly make interesting reading for us on this side of the water4 ,he states that at first he covered a frame with tracing paper1 then placed his principal between the sun and the screen1 thus throwing a shadow on the paper4 ,the camera was set up on the other side1 so as to photograph this shadow1 the lens1 of course1 pointed direct to the sun4 ,he then made the attempt to shade the lens with an umbrella4 ,he neglects to state how often he got the outline of the parapluie on his plate4 ,then he tried ,blitz-pulver--sitter1 camera1 and screen in same position4 ,result as might have been foretold--a miserable failure4 ,next the screen was placed in a doorway with a bright light back of the screen4 ,the subject was placed in front of the screen1 the room darkened1 the camera being placed in front of the sitter and screen4 ,a ,blitz-lamp exposure of five to six seconds was then made4 ,result--not a single specimen that equals our old silhouette4 ,so much for our ,viennese photographic cousins4 ,in these great ,united ,states we simply tack a piece of muslin in front of a window1 place the subject directly in front1 shut off all other light in the room1 focus1 fire1 and develop4 ,result--a good sharp profile almost all the time4 ,,julius ,f4 ,,sachse4 ,,some ,,further ,,details ,,about ,,prints4 ,the drying of a photographic print after the final washings have been completed is a simple enough matter1 and yet it is possible for the most exasperating failures to occur at this stage of the process2 the disappointment experienced being all the more keen because the work is in a certain sense finished4 ,those unacquainted with photographic neatnesses might easily imagine that all that was necessary was to take the print out of the water1 and lay it aside in any convenient place to dry4 ,they would soon find out1 however1 that if the substance with which the wet print came into contact were capable of communicating any impurity1 the print would be sure to show in the form of stains4 ,for instance1 suppose that the prints were hung over wooden poles1 or laid on wooden shelves while still wet1 there would hardly be a possibility of escape from stains4 ,this would be true in the case either of silver prints of any kind1 bromides1 or blue prints4 ,silver prints on plain paper and blue prints are more manageable in drying than the other forms which are made on papers prepared with a contractile substance like gelatine or albumen4 ,supposing that the wooden poles or shelves before spoken of were covered with clean white linen or blotting paper1 all those forms of prints having a plain surface might safely be dried there1 but an albumen paper print would not do so well2 if laid out flat on the shelf it would contract unequally1 and be so crinkled and shrunken that there would be serious difficulty in trimming4 ,drying over the pole would be preferable1 but the albumenized surface would be put on the stretch unequally1 so that in the case of a highly glazed surface there would be fissures and cracks very detrimental to the finished result4 ,the best method of drying prints of all descriptions1 and a very convenient and inexpensive one also1 is the following3 ,provide a number of spring clothes-pins1 a few yards of ordinary brass wire1 and a couple of good-sized screw-eyes4 ,having selected a suitable place in the workroom where the prints will not be disturbed1 screw in one of the screw-eyes to the wood of the window or door jamb at the height of the shoulder2 pass one end of the brass wire into the eye and secure it1 then string the clothes-pins on to the wire1 and secure its other end by means of the other screw-eye at a convenient point across the room4 ,having brought the prints from the washing tank in an ordinary deep pan1 select those of similar sizes1 bring them together neatly1 back to back1 while in the water1 then take them out and suspend the pair from one or more of the clothes-pins1 according to the size of the prints4 ,if they are very large1 it may require three of the clothes-pins to fully support them1 and avoid risk of the wet mass tearing by its own weight4 ,while on the other hand1 small sizes1 such as #ed inches1 may be held by a single pin4 ,when the paper is very glossy1 and the weather dry1 the larger sizes may require to be pinched together at the bottom corners by an additional couple of clothes-pins1 which will prevent the prints from separating until thoroughly dry4 ,prints dried in the manner described will be quite flat1 and free from stains of any kind4 ,we need hardly add that the clothes-pins should be new and clean1 and kept for this purpose only4 ,if the prints are hung up to dry in the evening1 they will be ready for trimming in the morning1 when the end of the wire may be released1 and the whole turned aside out of the way until the next occasion for use4 ,if the wash-water is muddy1 as is often the case1 the deep pan in which the prints are transferred to the drying-room may be filled with clean filtered water1 so that the collected mud in the paper may be soaked out before drying4 ,the warm weather we are now passing through reminds us of a few matters which have greatly eased our own labors in the printing-room1 and simple as they are we will mention them4 ,it sometimes happens that there is trouble in securing pure whites in prints on albumen paper1 an universal yellow stain covering everything4 ,the best remedy for this is the use of alum in the printing bath1 as originally suggested by the late ,mr4 ,anthony1 of ,new ,york4 ,care also must be taken that the paper is quite dry before being fumed4 ,operators are too apt to forget that as the thermometer rises1 so does the amount of watery vapor in the air increase1 and that sheets of paper will often dry more quickly on a bright day in winter than on many hot days in summer4 ,the way the paper feels to the hand is the best guide1 and some little attention is required to be able to tell accurately4 ,the question whether the strength of the silver bath should be reduced or not during warm weather is open to some discussion4 ,if the paper be of first-class quality1 and the bath contain alum1 as before alluded to1 it would be possible to continue making good prints having pure whites with the bath at full strength1 by which we mean fifty to seventy grains to the ounce4 ,there is no question of the fact that the sensitiveness of the prepared paper increases when floated on a strong bath1 and that the compound which is then formed between the albumen and the silver is more prone to decomposition4 ,it will occasionally happen1 if the prints come out yellow1 metallic-looking1 and covered with minute black specks1 that weakening the silver bath down to the strength of forty-five or even forty grains will cure the trouble4 ,a strength of forty grains1 however1 we should consider a low one1 and only to be resorted to for unusually hot weather or for particular kinds of paper1 such as very thin and delicate ,rives4 ,the paper should not be left in the fuming-box for too long a time in hot weather4 ,if things are properly arranged for the purpose1 ten to twelve minutes ought to suffice for thorough fuming4 ,it is important1 of course1 that good strong ammonia be employed1 and care should be taken that the glass stopper be well secured in the bottle4 ,in a hot printing-room the stoppers of ammonia bottles are frequently blown out by the vapor and fall on the floor1 leaving the contents of the bottle to lose strength rapidly4 ,,ellerslie ,,wallace4 ,,the ,,convention ,,at ,,washington4 ,the time for the ,eleventh ,annual ,convention of the ,photographic ,association of ,america is approaching1 and we hope the craft through the length and breadth of the land are preparing for it4 ,mr4 ,j4 ,m4 ,appleton1 the president1 sends the following circular1 which should be carefully studied by every photographer1 and also a specimen of the blank form to be filled up by intending exhibitors4 ,those who may not have received a copy should apply to him4 ,we published a list of the prizes to be awarded in our ,march number1 and now print the following3 ,,rules ,,for ,,judges ,,and ,,exhibitors3 ,,rules ,,governing ,,judges ,,in ,,the ,,grand ,,prize4 #a4 ,the points to be considered are3 ,first1 historic2 second1 originality2 third1 composition2 fourth1 lighting2 fifth1 technique4 #b4 ,ten marks to be the highest for any one point1 consequently1 fifty marks the most that can be given to any one picture4 #c4 ,the standard of this award must be thirty-five markings out of a possible fifty4 ,,rules ,,governing ,,judges ,,in ,,class ,a4 #d4 ,the principal points to be considered are3 ,first1 originality2 second1 composition2 third1 lighting2 fourth1 technique4 ,,rules ,,governing ,,judges ,,in ,,classes ,b1 ,c1 ,d ,,and ,h4 #e4 ,the following points to be considered are3 ,first1 lighting2 second1 posing2 third1 chemical effect2 fourth1 general effects or finish4 #f4 ,ten marks to be the highest for any one point1 consequently forty marks the most that can be given to any one picture4 #g4 ,the above regulations also to govern ,class ,a4 #h4 ,applications for space must be made to ,george ,h4 ,hastings1 ,no4 #adg ,tremont street1 ,boston1 ,massachusetts4 #i4 ,entries to close on ,tuesday1 ,july #ae1 and no space to be allotted for exhibits after that date4 ,all exhibits must be shipped so as to reach the exhibition on the ,saturday preceding the opening of the same1 and all charges to be prepaid4 #aj4 ,each picture or set of pictures must be marked with a letter signifying the class in which it is offered for competition4 #aa4 ,the exhibition of photographs connected with the convention is to be considered an art exhibition pure and simple4 ,in order not to detract from this standard1 no sign of any description shall be allowed in the hall devoted to the display of photographs1 except the names and addresses of the exhibitors4 #ab4 ,no exhibit for the grand prize or classes ,a1 ,b1 ,c1 ,d and ,h to occupy space of more than eight lineal feet1 and in class ,e1 ten lineal feet4 #ac4 ,all photographs exhibited must be from negatives made since the tenth annual convention1 held at ,boston1 ,massachusetts1 ,august1 #ahhi4 #ad4 ,all exhibitors must see that their displays are properly placed before #aj o'clock ,a4,m41 on ,august #ab1 and no exhibits will be admitted after that date4 #ae4 ,all art exhibits must be sent to ,george ,h4 ,hastings1 ,art ,department1 ,photographers' ,association of ,america1 ,smithsonian ,institute1 ,washington1 ,d4 ,c41 all charges prepaid4 ,,eleventh ,,annual ,,convention ,,of ,,the ,,photographers' ,,association ,,of ,,america4--,,smithsonian ,,institution1 ,,august #ab ,,to #ae4 ,,office ,,of ,,the ,,secretary1 ,,iowa ,,city1 ,iowa1 ,may #bd1 #ahij4 ,to the ,photographers of ,america3 ,the eleventh annual convention of the ,photographers' ,association of ,america will be held in the ,smithsonian ,institution at ,washington14 ,d4 ,c1 ,august #ab to #ae1 inclusive1 and from present indications the attendance will be larger than ever before4 ,why not take a few days' vacation and attend this meeting8 ,if you only knew the treat that awaits you in ,washington1 every photographer in the land would attend1 if they had to close their business for a week to do so4 ,a visit to the places of interest in ,washington1 the most beautiful city in the world1 will alone be worth the time and money spent4 ,the fine collection of paintings in the ,corcoran ,art ,gallery is of special interest to photographers1 as it contains some of the finest pictures in this country or in ,europe4 ,a visit to the capitol and government buildings1 the ,washington monument1 the ,white ,house1 the ,smithsonian ,institution1 and many other interesting points will add to the pleasure of this occasion1 and is alone well worth the time and expense of the trip4 ,the ,committee on ,railroads have secured a rate of one and one-third fare for the round trip on all trunk lines in every direction4 ,in order to obtain this rate1 you must obtain a receipt from the ticket agents of whom you purchase tickets on all roads1 and have them signed by ,w4 ,v4 ,ranger1 second vice-president1 at the convention1 this will entitle you to a one-third fare returning4 ,the headquarters of the convention will be at the ,ebbitt ,house1 and the following rates have been obtained at the different hotels3 ,ebbitt ,house1 two in a room1 #b4ej per day2 ,ebbitt ,house1 one in a room1 #c per day2 the ,arlington1 #c per day2 ,millards1 #c per day2 the ,national1 #b4ej per day2 the ,riggs1 #c per day2 the ,harris1 #b per day2 and many other hotels from #a4ej to #b4ej per day2 also several on the ,european plan1 rooms from #ej cents to #a4ej per day4 ,if you will look at the benefits to be derived from attending this meeting1 we feel sure that you will take the time and meet with us4 ,the unveiling of the ,daguerre memorial during the convention1 to be permanently placed in the ,smithsonian ,institution1 will be one of the special features4 ,this memorial is the gift of the photographers of ,america4 ,the fund is raised by one or more dollar subscriptions from the photographers 7which it would be well for you to send in your subscription at once to one of the different committees1 and help the matter along1 and do honor to the man who first brought to light this noble profession of ours74 ,you will miss it if you fail to come4 ,there will be some of the finest specimens of ,american photography ever exhibited1 as well as ,european4 ,i have the promises of exhibits from all the leading photographers of the world4 ,rules and regulations1 list of awards1 entries for competition1 etc41 will be mailed on application4 ,is not this association worthy of your support8 ,any photographer of good moral and professional standing is eligible4 ,if not already a member1 lose no time in uniting yourself with an organization already a power in the land4 ,it has stood the test of time 7eleven years71 and has a creditable standing throughout the length and breadth of the civilized world4 ,to become a member1 send five dollars if a proprietor1 and two dollars if an employ 7which pays entrance fee and dues for first year71 to the treasurer1 ,g4 ,m4 ,carlisle1 ,providence1 ,r4 ,i4 ,if already a member kindly remit your dues 7#b4jj71 and by so doing avoid waiting your turn at the entrance when you arrive at the convention1 as none can be admitted whose annual dues remain unpaid4 ,,extract ,,from ,,constitution4 ,,article ,,ii41 ,section #d4--,the annual dues become payable on ,january #a of each year1 and any member failing to pay the same prior to the adjournment of the annual convention shall forfeit his right to membership1 and can only be reinstated on payment of an initiation fee 7#c4jj7 and 7#b4jj7 dues1 #e4jj1 as provided in case of admission of new members4 ,become a member and get the benefits of the art lectures1 practical talks1 and a grand exhibition of photographic productions and stock exhibit4 ,fraternally yours1 ,d4 ,r4 ,,coover1 ,secretary4 ,we expect to publish1 in our next number1 an additional article on this subject1 from the pen of the president1 ,j4 ,m4 ,appleton1 which will reach our subscribers in ample time for the convention4 ,s4 99 99 99 99 99 ,the average newly-fledged photographer wishes to begin before breakfast4 ,the barn or the back-yard fence is good enough for him1 and if nothing else alive is in sight1 it is easy enough to try it on the dog4 ,few dogs1 however1 have a proper sense of the responsibility of being photographed4 ,after everything is carefully arranged1 they get up and want to go home4 ,sometimes they remain silent until the picture is started1 when they begin to stroll around and make eight or nine dogs on the plate2 or they sit still and only wag their ears1 until the negative shows something like a halo of ears4 ,this would give a professional photographer much worriment of mind1 but the amateur is generally wise enough to see that his failures are the funniest things he has4--,photo4 ,times4 ,,orthoscopic ,,photography4 ,it is well-known that there are a large number of coal-tar color products1 which have the property of causing an orthoscopic action on the ordinary sensitive dry plate1 making the plate more sensitive for a certain color than the others2 for instance1 eosine is a superior sensibilator for green-yellow and yellow-green2 cyanin1 again1 is especially sensitive for reds4 ,other products1 such as rhodamin1 cyclamin1 methyl1 violet1 and others1 generate in each instance an especial color sensitiveness4 ,while we have no deficiency in these mediums which answered for the greens and yellows1 we have but few that answer for the various shades of red4 ,although ,dr4 ,vogel has strongly recommended a mixture of chinolin red and chinolin blue 7cyanin71 the latter has two great drawbacks1 viz41 the salt is very dear1 and does not keep4 ,to overcome this difficulty ,i have instituted numerous experiments to replace the above with a more durable and cheaper medium4 ,among the various substances which ,i have tried1 the mixture of indophenol and malachite green1 has given me the most satisfactory results4 ,malachite green alone produces a strong sensibility to red1 but the addition of the indophenol greatly enhances this sensibility4 ,in connection with the experiments with this solution1 the interesting fact was observed that the sensibility for blue was greatly reduced in the brom-gelatine film1 while green and yellow appeared in their true color values4 ,my proceeding is as follows3 7,a47 ,dissolve #j4a g4 indophenol 7napthalin blue7 in #ejj ccm4 alcohol4 7,b47 ,dissolve #a g4 malachite green in #bjj ccm4 water4 ,the latter solution is heated to about #gj c4 ,in the meantime1 prepare a solution of #aj g4 doppelt chrom sauris kadi in #ajj ccm4 water1 at a temperature of #gj to #hj1 then pour this to the hot solution of malachite green4 ,this mixture is kept hot for half an hour and then filtered1 the precipitate which remains on the filter is now washed in several waters1 and finally again dissolved in a solution of ,alcohol #bej ccm4 ,chinin sulphate #j4h g4 ,the latter is first dissolved in a little alcohol by heating1 then the volume is added to until the amount is reached4 ,the filtered fluid has a beautiful greenish-blue color4 ,this forms the stock solution4 ,to sensitize the plates1 make the following bath1 pour in graduate3 ,indophenal solution 7as above7 #d ccm4 ,malachite green 7stock solution7 #d ccm4 ,water 7distilled7 #fjj ccm4 ,pour #fj ccm4 of this solution in a tray 7#ac by #ah cm47 cover the plates and soak #b minutes1 keeping the tray in constant motion4 ,during the operation all red rays must be carefully excluded2 then the plate is drained and dried in absolute darkness4 ,plates so treated are much quicker than when in their normal condition4 ,they give the reds in their true color value1 even through an intensive yellow color screen4 ,even this extreme color sensibility can be enhanced with the use of a 8supplementary-ray filter0 78,ergnzungs-,strahlen filter071 which is made from a substance which absorbs all colors except the reds and yellow4 ,gelatine1 dyed by soaking in a erythrosin solution1 furnishes an excellent ,ergnzungs-,strahlen filter1 which is used in connection with the usual yellow color screen ,m4 ,,leon ,,vidal4 ,,photography ,,in ,,rome4 ,the ,bollettino1 a journal published every two months in ,rome1 and the chief organ of those interested in photography in that city1 gives the result of the last election of members of its ,photographic ,society as follows3 ,adler1 ,dottor ,vittoria2 ,intriglio1 ,avv4 ,benedetto2 ,tenerani1 ,cav4 ,carlo2 and of the correspondent members--,calvaria1 ,cav4 ,avv4 ,giuseppe1 of ,castellamare di ,stabia2 ,daniele1 ,oreste1 of ,catania2 ,garzia1 ,oronzo1 of ,maglie2 ,hermans1 ,charles1 of ,brussels2 and ,orsini1 ,marchese ,antonio1 of ,solmona4 ,the opening of the ,second ,annual ,exhibition of ,photography took place in the ,palazzo di ,belle ,arti on the #b;d of ,may1 when a large number of members took part4 ,the display included landscapes and interiors1 portraits1 instantaneous views1 film negatives1 photo-micrographs1 enlargements1 flash-light pictures1 architectural views1 and representations of costumes taken in ,morocco and in ,sweden4 ,an excellent article on 8,the ,duration of the ,pose0 begins thus3--8,formerly1 when collodion occupied the whole field of photography1 the first difficulty in the art was the preparation of the sensitive surface4 ,now that the preparation has undergone a radical change1 passing into a branch of industry1 that first difficulty has vanished1 and there has succeeded to its place the duration of the pose1 the exact determination of which has over the resulting picture an influence as great1 and possibly greater than formerly1 seeing that in the very short poses of the present time even a little error has a value of relatively greater importance40 ,the article goes on to say that the duration depends 7#a7 on the sensitive preparation1 7#b7 on the actinic power of the light1 7#c7 on the object1 7#d7 on the diaphragm1 and 7#e7 on the distance4 ,thus1 if it were required to represent by an algebraic formula the conditions governing the pose t1 we should have-- t k4 ,p4 ,l4 ,o4 d4 ,d4 where k is the invariable constant4 ,the article1 which is too long to translate1 is written by ,a4 ,roncalli4 ,it is succeeded by a short notice of the effects of the ,schippang varnish upon collodion enlargements4 ,this article1 written by ,ab4 ,f4 ,castracane1 makes mention of some unhappy results of the use of this varnish on some of his own pictures4 ,after this comes a letter from ,sac4 ,d4 ,ratti1 on halation1 or aureole1 as the ,italians call it4 ,then a paper on the development of instantaneous negatives and on the toning of aristotype paper1 by ,bne4 ,t4 ,melazzo4 ,various notes and receipts1 with a bibliography and a short notice of the illustrated supplement1 complete this interesting number4 ,the illustration is that of a moonlight effect1 the negative by ,a4 ,ducros1 the phototype by ,danesi1 of ,rome4 8,to obtain this picture10 says the letter-press note1 8it was sufficient to set the machine against the setting0--pardon the indiscretion2 ,i was about to add sun--8and to remove the cap4 ,but1 before this is done1 that certain fifth sense has to be taken into account1 without which1 #8,non licet adire ,corintum6' and ,signor ,ducros1 profound and advanced artist and photographer as he is1 possesses this fifth sense1 and uses it in a masterly manner40--,photographic 7,london7 ,news4 ,,amateur ,,experiences4--,,iv4 ,if any one wants to become thoroughly acquainted with the weaknesses and frailties of humanity1 just let him become a camera carrier1 in 8all that the word implies10--and he will enter a school1 wherein he will learn more of the different phases of human nature in one lesson than he has during the last ten years of his life4 ,no other vocation1 if we except that of the live newspaper reporter1 offers the same advantages in this biological study4 ,varied indeed are the experiences and vicissitudes of the amateur photographer1 whether the camera bearer carries the latest ,universal1 with aluminium mounting1 or rejoices in a ,premium ,pinhole outfit1 he experiences the same annoyances and disappointments4 ,ignorant and unreasonable people are sure to be met with on an outing1 and1 worse than all1 he has frequently to suffer for the sins of some rude member of the guild who has been there before him4 ,experiences like these are but too apt to discourage persons of a nervous or sensitive temperament2 the picture1 however1 is not all shadows4 ,there is often a bright side for the camera bearer1 especially if he be susceptible of the humorous4 ,photographically speaking1 the writer1 in addition to such annoyances as double exposures1 unaccountable fog1 forgetting to draw the slide1 put plates in the holder1 or take the cap off1 to say nothing of neglecting to insert the stop1 has met with many rebuffs and disappointments on his outings1 through meeting with ignorant or unreasonable people1 in all such cases his rule has been always to look upon the comical side of the situation1 and try to achieve his object1 bringing into play his common sense1 tact and knowledge of human nature1 generally with the result of obtaining the coveted negative4 ,the trouble1 however1 does not always lay in the strangers we meet in our travels2 the fault too often is with the camera bearer4 ,there is a class of persons1 largely represented among the guild of amateur photographers1 who presume entirely too much on their wealth or social standing1 and who at home pride themselves on their good breeding and polite manners1 claiming to be within the so-called exclusive social circles or sets2 yet they no sooner get away from the restraint of their immediate surroundings1 such as a photographic outing affords1 than they seem to forget that at least a little courtesy is due the strangers on whose premises they trespass4 ,the dweller in a picturesque tumble-down shanty1 or custodian of an old colonial or religious land mark1 no matter in how humble circumstances of life they may be1 have rights guaranteed them under the law1 which even the exclusive amateur is bound to respect4 ,one specimen of this kind will often spoil the game for all amateurs for some time to come4 ,we will give a few instances which have come under our notice4 ,early last spring two prominent members of the ,quaker ,city ,camera ,club concluded to photograph an historic old church in one of the ,german counties 7so-called7 in our state4 ,the place was rather difficult of access1 being away from the usual lines of modern travel1 so extensive preparations were made4 ,the day proved all that could be desired4 ,a team had been telegraphed for1 and met the pair at the nearest railroad station4 ,when the spot was reached the outfits were quickly unpacked and set up4 ,no permission was asked1 nor notice was taken of flower-beds trampled over1 or other damage done4 ,then the bell of the parsonage was rung1--the clergyman answered the call in person4 ,the spokesman1 great in his own importance1 asked for the keys of the church1 as they wished to photograph it4 ,the dominie answered1 with an unmistakable ,pennsylvania ,dutch accent1 that the sexton lived about a half a mile down the road4 ,the reply was1 that as he had a key it did not suit them to run after the sexton4 ,well1 one word brought on the other1 and the parley ended with the clergyman saying1 8,you will please excuse me2 ,i got no time to fool with such nonsense1 and ,i can't be bothered with opening the church for every fool photographer who chooses to come out here from town2 please go about your business1 if you have any40 ,the interview closed with the threat by the parson to use a hoe-handle over the next photographers who should come to bother him with their intrusiveness4 ,our two amateurs packed up their outfits and beat an ignominious retreat1 going back to ,philadelphia with temper ruffled and object unaccomplished4 ,a few days after this episode one of the twain1 wishing to have some sport at our expense1 suggested to the secretary of the ,leopardville ,camera ,club the advisability of a trip to the adjoining county1 and securing for him a set of negatives of the old landmark4 ,we knew nothing of what happened1 and consequently1 owing to our innocence and unsophisticated nature1 we unconsciously fell into the snare that our kind friend laid for us on the first fine day4 ,we made an early start4 ,we went merrily over hill and dale1 not dreaming of trouble4 ,when within half a mile of the church1 we stopped at a roadside inn to water our horse and inquire our way4 ,we remembered the hostler1 who1 while reigning up1 caught a glance at our outfit4 ,to our surprise1 he broke out with1 8,say1 ,mishter1 vas you a fotegraf feller80 8,why80 we queried4 8,vell1 if you vas1 tont go to der krch up dere2 der breecher letzt woch putty near broke zwei fotegraf feller's het's up40 ,here was a revelation4 ,our nickel had been well invested4 ,we made closer inquiries1--from the description1 we at once recognized our friend from the ,quaker ,city who had suggested our trip1 and was no doubt chuckling in anticipation of a countryman's discomfiture4 ,after a few moments' thought we continued on our way4 ,we met the dominie1 and when we got back to our home we had eight negatives1 exteriors and interiors1 in our satchel4 ,in one of the latter the dominie appears in the quaint old pulpit4 ,with our ten dollar outfit1 by the use of civility1 tact1 and common sense1 we had accomplished that in which our predecessors had so signally failed1 mainly by not exercising the common civility due towards a stranger4 ,another case which came under our notice but a few weeks ago3 ,in an adjoining county there still exist several quaint old buildings1 erected during the middle of last century by a religious community1 and used by them until long after the ,revolution4 ,owing to the curious architecture and proximity to a summer resort1 the property is often overrun by visitors and sightseers1 who run over the grounds1 enter the houses1 intrude on the privacy of the inmates1 as if they had no rights of their own whatever1 and in fact act as if the whole premises were public property4 ,the custodian or trustee of the property is a plain country ,dutchman1 and keeps an especially sharp lookout for amateur photographers1 as the religious sect to which he belongs frowns down portraiture of any kind4 ,a few weeks ago a party of nine or ten persons1 ladies and gentlemen1 made a pilgrimage to the old settlement under the leadership of a well-known pulpit orator in ,pennsylvania4 ,among the party were several amateur photographers4 ,when the party arrived at the grounds they entered1 without as much as asking permission1 and at once made themselves at home within the premises regardless of the inmates4 ,while the amateurs were setting up their cameras1 the preacher was airing his knowledge of the religious doctrines of the community which flourished there in days gone by4 ,while making these derogatory allusions1 the party had been joined by a stranger1--it was the trustee1 and who lost no time in introducing himself to the preacher4 ,the two men were a study for an artist4 ,the preacher1 who prided himself on his fine physique1 oratorial powers1 and dignity1 was the ideal picture of the petted fashionable preacher of the present day4 ,the other1 a man of medium height1 bare-footed1 unkempt2 a straw-hat of last season's growth1 a shirt of unbleached muslin1 a pair of overalls1 which hung by a single 8gallus10 completed his wardrobe2 his language was pure and unalloyed ,pennsylvania ,dutch4 ,in appearance the two men as they faced each other were as diametrically opposite as the poles4 ,the trustee1 without any ceremony1 asked the preacher what he was doing there2 the latter1 looking down at the speaker with contempt and scorn1 and nettled at the interruption1 curtly told him to attend to his own affairs4 ,this was more than the trustee could stand1 and he at once ordered the party to pack up and get out4 ,this in turn was too much for the preacher2 so1 turning to the trustee1 said1 8,my good fellow1 you seem not to know whom you are addressing2 ,i am the ,rev4 ,dr4 ----1 of ---- ,church1 in ,philadelphia1 and ,i wish you to understand that you are in the presence of ladies and gentlemen1 and ,i would advise you to take yourself off without ado1 as your presence here is unwarranted1 uncalled for1 and distasteful to the persons present as well as myself personally2 and further1 your appearance is hardly such as would be permitted within the circles in which the ladies present are in the habit of moving40 ,during this speech the trustee stood with mouth and eyes wide open4 ,the others of the party nodded approval as their spiritual leader was delivering himself4 ,one of the photographers was trying to train his camera on the countryman1 who had for a few moments stood speechless4 ,but it was only the calm before the coming storm4 ,with a bound the trustee kicked over the tripod and camera2 then1 turning to the preacher in an unmistakable attitude1 told him in his rich ,german ,english1 that he was on private property1 tramping down a growing grass crop1 and if he and his crowd didn't pack themselves off at once he would arrest and fine the party for trespassing4 8,but1 my good fellow10 ventured the now crestfallen preacher4 8,don't speak to me60 was the retort4 8,you claim to be a gentleman2 maybe you try to be at home4 ,but if you were one1 you would know better than coming with a crowd on another's place1 where you have no business1 without even asking permission40 8,but1 my good man1 we are willing to pay you if--0 broke in the preacher4 8,we don't want your money4 ,all ,i want is for you to go and not bother us4 ,or do you want me to show you the way80 ,all this was said in the rich vernacular peculiar to the locality4 ,there was no help2 the trustee was on his own ground4 ,so the party retreated and filed singly over the old stile into the road4 ,it would be hard to say which of the party felt the sadder as they wended their way towards their conveyance1 the crestfallen preacher or the ,rittenhouse amateur with his shattered outfit4 ,this was but another instance where a little courtesy and politeness would have saved humiliation and photographic disappointment4 ,j4 ,,focus ,,snapschotte4 99 99 99 99 99 ,a ,,record ,,in ,,development4--,many amateurs are so fidgety about their dark-room and its appendages that we describe1 both for the benefit of the finic and also for 8those who go down to the sea0--in trains1 how an extemporized traveling dark-room was successfully used by a member of the newly founded ,croydon ,camera ,club4 ,in case the railway superintendent should reprimand the guard who connived at the measures adopted1 we must perforce suppress the gentleman's name1 the date1 and the station where the train was joined4 ,about a fortnight ago ,mr4 ,x4 ran down for the day to visit his friend ,y41 who dwells somewhere on the south coast1 within about one and a half hour's journey from ,croydon4 ,mr4 ,x4 having exposed sixteen quarter-plates1 ,y4 enquired of him when they would be developed4 8,to-night10 answered ,x41 and added1 8,perhaps before ,i get to ,croydon40 ,y4 expressed incredulity1 on which ,x4 guaranteed that he would have all the plates developed before reaching his destination4 ,no previous preparation had been made1 and the train started in forty minutes from the time of above conversation4 ,a sheet of ruby paper1 some drawing pins1 some oiled paper1 and a piece of ,willesden waterproof paper1 together with ,beach's developer1 in two solutions1 were procured4 ,the guard was duly 8tipped10 and a pail of water obtained from the engine-driver4 ,mr4 ,x4 being safely locked in a third-class compartment1 the ,willesden paper was made into a tray1 with sides three inches deep1 on account of the swaying of the train4 ,the ruby paper was pinned over the carriage lamp1 and the blinds carefully drawn4 ,the night was1 fortunately1 a dark one4 ,most of the plates were shutter views2 these were first developed1 the developer being used for about three plates and then thrown away4 ,the time views were subsequently developed1 with a suitable modification in the proportions of developer4 ,the plates were well rinsed in the pail of water1 and while wet wrapped in oiled paper1 and thus packed in the ordinary boxes in which they are sold2 the object of using oiled paper being that it does not stick to the film when the latter is either dry or wet4 ,the plates were all developed before ,red ,hill was reached2 the fixing being deferred until arriving home4 ,the resulting negatives were not noticeably inferior to those which the same worker generally produces in his dark-room4 ,we have before us a print of a wreck with fisher-boats 8salving10 which is distinctly above the average skilled amateur work4 ,if so good a result is attained by adapting a railway carriage on the spur of the moment1 even better could be done by pre-arranging to make use of the dreary time spent in traveling by night4 ,the above tour de force is a strong argument in favor of those railway companies who run journeys of from five hours upwards1 such as the ,scotch express1 providing a well-fitted but inexpensive dark-room4 ,a luggage van might be converted1 with an open compartment for workers to sit in when their 8dark deeds0 are done4 ,a pleasant vision is opened up of snap-shot views1 taken from a railway carriage1 and developed during the journey4 ,of course1 plates need not be exposed while the train is 8hurtling0 along at seventy miles an hour2 but in a1 say1 ten hours' journey there are many stoppages and slackenings of speed which a member of the 8wideawakes0 could profitably utilize4--,the ,amateur ,photographer4 ,,military ,,photography4 ,captain ,curties1 of the ,royal ,engineers1 has written a series of articles on the above subject1 which were published in the ,broad ,arrow4 ,in the last of the series he gives a description of his photographic outfit4 ,his arrangements for exposing and developing the plates in the field afford interesting reading4 ,however1 judging from our own experiences on the scout1 the picket line1 or field1 we should say that the whole scheme1 as portrayed by ,captain ,curties1 is more or less chimerical1 and no matter how plausible the plan may seem or read to the members of a theoretical camera club in their well-furnished quarters1 there are certain difficulties in the way which would make the scheme impracticable1 and even if these were overcome1 the results would be of but little if any use in actual service1 a fact which will be apparent to anyone who has seen active military service4 ,the captain in his articles says3 8,the one object ,i have kept in view all through has been to simplify the art as much as possible1 and to make each photographic section complete in itself1 and able to take1 develop1 and print a picture without any outside help in the shortest time possible4 ,having this end in view1 my equipment supplies in the first place two light knapsacks1 to be carried in a reconnaissance by two mounted officers or men4 ,one contains a very light fold-up camera1 capable of taking pictures #aj in4 by #ab in41 round which is wrapped the focussing cloth4 ,it has not appeared to me desirable to place before a general a view of a country smaller than this4 ,the extra weight would be more than compensated for by the comprehensive picture obtained2 moreover1 in a small plate1 ,i take it1 distance would not be fairly and distinctly portrayed4 ,the other knapsack carries three dark slides1 very light but strong1 each containing two plates4 ,this knapsack also contains the lens1 instantaneous shutter1 etc4 ,both knapsacks are made to fit close to the back1 and1 in addition to the straps passing over the shoulders1 are secured to the sword-belt1 thus preventing any injurious motion when riding4 ,by the simple act of unbuckling one strap1 each can be at once unslung ready to be unpacked4 ,the tripod1 which is made as light as can be consistently with strength and stability1 is carried folded up in a bucket attached to the saddle1 and fixes immediately on to the camera4 ,we next proceed to the all-important subject of 8developing0 in the field4 ,for this purpose ,i use a tent composed of a large1 folding1 umbrella-shaped top1 made of a material which admits a deep ruby light4 ,when this is opened and fixed in the ground1 it stands just clear of a tall man's head4 ,over it is dropped a sort of sack1 open at bottom ends1 the top end being much smaller than the bottom end1 and capable of being drawn together by means of two cords4 ,this sack is lightproof and waterproof4 ,the lower end is held down by means of a light iron hoop or ring1 which also folds up to facilitate packing4 ,the hoop is attached to the bottom of the sack in such a way that a border of the material extends beyond it1 and rests upon the ground4 ,this1 in the ordinary way1 is sufficient to keep out light1 but should any find its way in1 a few handfuls of earth or stones heaped up round the border will effectually keep it out4 ,the stick of the umbrella is a hollow bamboo1 open at the top4 ,it is pierced with holes to about half its length2 this ventilates the tent4 ,a cap placed over the top of the stick excludes light1 but not air4 ,we now have a complete tent in which a man can move about freely1 and use his hands without constraint1 and1 above all1 he is not half stifled1 as one generally is in the usual run of developing tents4 ,it can be taken down at a moment's notice1 and packed in a very small compass1 the whole being exceedingly light and compact4 ,a few stays may be necessary in windy weather to keep it steady4 ,the person about to develop a plate slings over his shoulders1 knapsack fashion1 a small metal tank1 containing sufficient water to wash several plates2 attached to it is a gutta-percha tube and tap4 ,round the waist is buckled a broad leather belt1 in which are fixed bottles containing the developing solutions1 etc4 ,a light fold-up trough1 with a gutta-percha drain-pipe1 carried outside the tent1 and two light shelves1 hook on to the stick of the umbrella4 ,all that now has to be done is to lift up the walls of the tent1 step inside1 and develop and print the picture1 which by using bromide-paper 7undoubtedly the process for military use71 would take something like a quarter of an hour1 the printing1 of course1 to be done from the wet plate4 ,i may mention that ,i use scarcely any glass beyond the plates 7which ,i believe in72 those articles which are made of glass are protected to prevent breakage4 ,i believe myself that the whole of the articles now made of glass can be manufactured from a preparation of celluloid1 which is strong1 light1 and durable4 ,i hope shortly to have a complete set of bottles1 measures etc41 made of celluloid40 99 99 99 99 99 ,m4 ,,stravos ,,zellis1 of ,alexandria in ,egypt1 recommends the following process for marking or lettering on the sensitized paper such names as we wish to give the prints4 ,he takes a piece of thin white paper and traces upon it the words which he wishes to have at the bottom of his negative1 and oils it on both sides2 having removed the excess of oil by rubbing it between two sheets of bibulous paper1 he coats it with varnish on both sides and allows it to dry4 ,on the other hand1 he removes from the bottom of the negative a portion of the gelatine1 equal to the size of the paper1 and substitutes for it the paper1 which he sticks by means of a solution of gum arabic and water4 ,he removes then the air bubbles1 which would prevent complete adherence1 and this being done1 waits for his work to dry4 ,if1 when printing on the sensitized paper1 it is found that the letters do not show very white1 the defective portions should be retouched on the back of the oiled paper4 ,to write his name ,mr4 ,zellis makes use of a mixture of gum arabic1 lampblack1 and water4 ,this process is simple1 cheap1 and gives excellent results4--,annals ,photographique4 99 99 99 99 99 ,at the meeting of the ,photographic ,society of ,berlin1 ,president ,stolze exhibited the sketch of the ,daguerre monument to be erected in ,washington city1 at the cost of six thousand dollars4 ,dr4 ,julius ,stinde declared never to have seen anything more disgusting 7schauerlicheres7 than this unhappy head of ,daguerre1 crushed under the weight of a large ball1 and attributes the depravity of our taste to the high duty on articles of fine arts4 ,he says that such monstrosities show that we ,americans are yet in point of art barbarians of the purest water4 ,mr4 ,e4 ,himly1 as well as ,dr4 ,stolze1 takes our part1 and shows that the ,american photographic journals have unanimously condemned and ridiculed ,mr4 ,h4 ,mc,michel's scheme1 and exonerate us as a body4 ,bravo6--,photographische ,nachrichten4 ,,daguerre4 ,on the twelfth of ,august1 in front of the ,smithsonian ,institute1 in ,washington1 dedicated to manifold arts and sciences1 will be erected a lasting memorial to ,daguerre1 the author that we all know fixed the visible image on a given surface1 which is photography1 with all its varieties and names1 and they are numerous4 ,why should we ,americans put up such a memorial8 ,the inscription on the granite below the bronze portrait tells the story3 ,illustration 8,to commemorate the first half century in photography1 #ahci-ahhi4 ,photography1 the electric telegraph1 and the steam engine are the three great discoveries of the age4 ,no five centuries in human progress can show such strides as these4 ,erected by ,,the ,,photographers' ,,association ,,of ,,america1 ,august1 #ahij40 ,the monument1 now almost complete1 its bronze features being of a high order of art1 will stand sixteen feet high1 and will be the only international monument in the city of ,washington1 where ,smithson himself dedicated his fortune for the advancement of science in the western world4 ,in connection with this celebration we present to our readers a portrait of ,daguerre4 ,strange to say1 there are but few authentic portraits of ,daguerre in existence4 ,in our search for such a portrait we discovered the one here reproduced2 it was engraved by ,orr from a photograph by ,dr4 ,meade1 of ,new ,york1 for the ,international ,magazine1 of that city1 and used to illustrate the obituary of the eminent ,frenchman1 ,september #a1 #ahea4 ,as everything relating to ,daguerre cannot but prove of interest at the present time1 we republish the interesting article in full as it appeared at the time3 ,lewis ,jacques ,mande ,daguerre1 whose name is forever associated with the photographic process1 of which he was the discoverer1 died on the tenth of ,july1 in ,paris1 in the sixty-second year of his age4 ,he was a man of extreme modesty and great personal worth1 and was devoted to art4 ,he was favorably known to the world before the announcement of his discovery of the ,daguerreotype4 ,his attempts to improve panoramic painting1 and the production of dioramic effects1 were crowned with the most eminent success4 ,among his pictures1 which attracted much attention at the time of their exhibition1 were1 8,the ,midnight ,mass10 8,land-slip in the ,valley of ,goldan10 8,the ,temple of ,solomon10 and 8,the ,cathedral of ,sainte ,marie de ,montreal40 ,in these the alternate effects of night and day1 and storm and sunshine1 were beautifully produced4 ,to these effects of light were added others1 from the decomposition of form1 by means of which1 for example in 8,the ,midnight ,mass10 figures appeared where the spectators had just beheld seats1 altars1 etc42 and again1 as in 8,the ,valley of ,goldan10 in which rocks tumbling from the mountains replaced the prospect of a smiling valley4 ,the methods adopted in these pictures were published at the same time with the process of ,daguerreotype1 by order of the ,french ,government1 who awarded an annual pension of ten thousand francs to ,daguerre and ,m4 ,niepce1 ,jr41 whose father had contributed towards the discovery of the ,daguerreotype4 ,daguerre was led to experiments on chemical changes by solar radiations1 with the hope of being able to apply the phenomena to the production of effects in his dioramic paintings4 ,as the question of the part taken by him in the process to which he has given his name has been discussed sometimes to his advantage1 it appears important that his position should be correctly determined4 ,in #ahjb1 ,wedgwood1 of ,eturia1 the celebrated potter1 made the first recorded experiments in photography2 and these1 with some additional ones by ,sir ,humphrey ,davy1 were published in the journals of the royal institution4 ,in #ahad1 ,mr4 ,joseph ,nicephore ,niepce was engaged in experiments to determine the possibility of fixing the images obtained in the camera obscura2 but there does not appear any evidence of publication of any kind previously in #ahbg1 when ,niepce was in ,england4 ,he there wrote several letters to ,mr4 ,bauer1 the microscopic observer1 which are preserved and printed in ,hunt's 8,researches on ,light40 ,he also sent specimens of results obtained to the ,royal ,society1 and furnished some to the cabinets of the curious1 a few of which are yet in existence4 ,these were pictures on metallic plates covered with film of resin4 ,in #ahbd ,daguerre commenced his researches1 starting at that point at which ,wedgwood left the process4 ,he soon abandoned the employment of the nitrate and chloride of silver1 and proceeded with his inquiry1 using plates of metal and glass to receive his sensitive coating4 ,in #ahbi ,mr4 ,vincent ,chevalier brought ,niepce and ,daguerre together1 when they entered into partnership to prosecute the subject in common4 ,for a long time they appear to have used the resinous surface only1 when the contrast between the resin and the metal plates not being sufficiently great to give a good picture1 endeavors were made to blacken that part of the plate from which the resin was removed in the process of heliography 7sun drawing71 as it was most happily called4 ,amongst other materials1 iodine was employed2 and ,daguerre certainly was the first to notice the property possessed by the iodine coating of changing under the influence of the sun's rays4 ,the following letter from ,niepce to ,daguerre is on this subject3 8#ha1 ,,loup ,,de ,,varvennes1 ,june #bc1 #ahca4 8,sir and ,dear ,partner3--,i had long expected to hear from you with too much impatience not to receive and read with the greatest pleasure your letters of the tenth and twenty-first of last ,may4 8,i shall confine myself in this reply to yours of the twenty-first1 because1 having been engaged ever since it reached me in your experiments on iodine1 ,i hasten to communicate to you the results which ,i have obtained4 ,i had given my attention to similar researches previous to our connection1 but without hope of success1 from the impossibility1 or nearly so1 in my opinion1 of fixing in any durable manner the image received on iodine1 even supposing the difficulty surmounted of replacing the lights and shadows in their natural order4 ,my results in this respect have been entirely similar to those which the oxide of silver gave me2 and promptitude of operation was the sole advantage which these substances appeared to offer4 ,nevertheless1 last year1 after you left this1 ,i subjected iodine to new trials1 but by a different mode of application4 ,i informed you of the results1 and your answer1 not at all encouraging1 decided me to carry these experiments no farther4 ,it appears that you have since viewed the question under a less desperate aspect1 and ,i do not hesitate to reply to the appeal which you have made4 8,j4 ,n4 ,,niepce40 ,from this and other letters it is evident that ,niepce had used iodine1 and abandoned it on account of the difficulty of reversing the lights and shadows4 ,daguerre employed it also1 as it appears1 with far more promise of success than any obtained by ,m4 ,niepce4 ,on the fifth of ,july1 #ahcc1 ,niepce died2 in #ahcg ,daguerre and ,isodore ,niepce1 the son and heir of ,nicephore ,neipce1 entered into a definite agreement1 and in a letter written on the first of ,november1 #ahcg1 to ,daguerre1 ,isodore ,niepce says1 8,what a difference1 also1 between the method which you employ and the one by which ,i toil on6 ,while ,i require almost a whole day to make one design1 you ask only four minutes6 ,what an enormous advantage6 ,it is so great1 indeed1 that no person knowing both methods would employ the old one40 ,from this time it is established that although both ,niepce and ,daguerre used iodine1 the latter alone employed it with any degree of success1 and the discovery of the use of mercurial vapor to produce the positive image clearly belongs to ,daguerre4 ,in ,january1 #ahci1 ,daguerreotype pictures were first shown to the scientific and artistic public of ,paris4 ,the sensation they created was great1 and the highest hopes of its utility were entertained4 ,on the #aeth of ,june ,m4 ,duchatel1 ,minister of the ,interior1 presented a bill to the ,chamber of ,deputies relative to the purchase of the process of ,m4 ,daguerre for fixing the images of the camera4 ,a commission appointed by the ,chamber1 consisting of ,arago1 ,etienne1 ,carl1 ,vatout1 de ,beaumont1 ,toursover1 ,delessert 7,francois71 ,combarel de ,leyral1 and ,vitet1 made their report in ,july1 and a special commission was appointed by the ,chamber of ,peers1 composed of the following peers3 ,barons ,athalin ,besson1 ,gay ,lussac1 the ,marquis de ,laplace1 ,vicomte ,simeon1 ,baron ,thenard1 and the ,comte de ,noe1 who reported favorably on the #cjth of ,july1 #ahci1 and recommended unanimously that the 8bill be adopted simply1 and without alteration40 ,on the #aith of ,august the secret was for the first time publicly announced in the institution by ,m4 ,arago1 the ,english patent having been completed a few days before1 in open defiance and contradiction of the statement of ,m4 ,duchatel to the ,chamber of ,deputies1 who used these words3 8,unfortunately for the authors of this beautiful discovery1 it is impossible for them to bring their labor into the market1 and thus indemnify themselves for the sacrifices incurred by so many attempts so long fruitless4 ,this invention does not admit of being secured by patent40 ,in conclusion1 the ,minister of the ,interior said3 8,you will concur in a sentiment which has already awakened universal sympathy4 ,you will never suffer us to leave to foreign nations the glory of endowing the world of science and of art with one of the most wonderful discoveries that honor our native land40 ,daguerre never did much towards the improvement of his process4 ,the high degree of sensibility which has been attained has been due to the experiments of others4 ,daguerre is said to have been always averse to sitting for his own picture1 and there are but few photographs of him in existence4 ,the one from which our engraving is copied was taken by ,mr4 ,meade of this city1 and first appeared in the ,daguerrean ,journal1 a monthly periodical conducted by ,s4 ,d4 ,humphrey and ,l4 ,l4 ,hill1 who were distinguished for their improvements upon ,daguerre's process4 ,,gelatinography4 ,a very rapid process to make newspaper illustrations1 called gelatinography1 is described in the following3 ,a black glass plate or a tin plate coated with black varnish1 as used by sign-painters1 is covered with plaster of ,paris 7gypsum7 to a thickness of four-ply cardboard4 ,the plaster of ,paris must be of the best quality and reduced to a very fine powder4 ,add thereto some alum and some sulphate of barium1 and in order to prevent the coating from being too brittle1 add also a trifle of glycerine or of a gelatine solution4 ,this mixture must have the consistency of a thin pulp when applied to the glass or tin with a soft camel's-hair brush4 ,when dry1 the artist may engrave into this coat of plaster of ,paris1 by means of a lithographic engraving needle1 any design or picture with the greatest ease2 the plate or glass is thereby laid bare1 and design or picture appears black through the plaster of ,paris coating4 ,mistakes or errors are easily remedied by filling in the plaster of ,paris preparation4 ,with the regular printers' roller composition a stereotype is now made of the picture or design on the glass or plate1 in the usual way2 some bichromate of ammonia solution should be added to the roller composition1 to make the stereotype hard enough for the type press1 and it will be as durable as any electrotype1 and answer the same purpose4--,am4 ,lith4 and ,printer4 99 99 99 99 99 ,,stereoscopic ,,photography4--,of late1 there is quite a revival in this branch of our art-science1 several ,english and many foreign amateurs having been working with twin lenses during the last and present seasons4 ,the ,belgian ,bulletin has an article on the subject1 and the last technical meeting of the ,photographic ,society was devoted to it4 ,although ,wheatstone announced the instrument in #ahch1 it was not until photography had come to his aid by furnishing satisfactory diagrams1 and ,brewster had popularized the matter by the invention of the lenticular stereoscope1 that much progress was made2 then ,wheatstone gave his ,bakerian lecture on ,january #aeth1 #aheb1 to put the finishing touch to this important branch of scientific work4 ,the earlier attempts failed by reason of employing too wide an angle4 ,,eclipse ,,photography4 ,probably in no department of science1 certainly in no branch of astronomical science1 has photography been of such use as in the study of solar eclipses4 ,it is only when the sun is obscured by the moon that we are able to see and properly photograph the corona or luminous atmosphere around the sun4 ,this solar corona1 as has been said by ,young1 8is visible only about eight days in the century in the aggregate1 and then only over narrow strips of the earth's surface1 and but from one to five minutes at a time by any one observer40 ,very little of the eight days1 however1 can be utilized2 indeed1 as has been pointed out by ,miss ,clerke in her admirable ,history of ,astronomy ,during the ,nineteenth ,century1 the corona has only been observed by scientific men during forty-five minutes in as many years4 ,opportunities of observing an eclipse occur therefore at such comparatively long intervals1 the phenomena to be observed are so varied and extensive1 and the time during which the observations must be made is so very limited1 that any permanent records of the phenomena1 such as photography enables us to obtain1 cannot fail to be of the greatest value4 ,the most careful drawings of the same eclipse by different observers at the same station are so very dissimilar that it is generally unsafe to base any conclusion on them2 whereas in photographs we have truthful records of the actual phenomena without personal equation of any kind1 and with the additional advantage that there is more detail in the photograph than it is possible to insert in any drawing made during an eclipse1 or even at leisure after the three or four minutes' observation of such an indefinite and irregular object as the corona4 ,the history of the increase of our knowledge of the corona is practically the history of the improvement of our photographic methods of attacking the phenomena of an eclipse4 ,the first occasion on which photography was used at an eclipse of the sun was on ,july #h1 #ahdb1 when ,professor ,majocchi1 at ,milan1 attempted to obtain ,daguerreotype pictures of the corona4 ,his account of the attempt informs us that 8a few minutes before and after totality an iodised plate was exposed in a camera to the light of the thin crescent1 and a distinct image was obtained2 but another plate exposed to the light of the corona for two minutes during totality did not show the slightest trace of photographic action4 ,no photographic alteration was caused by the light of the corona condensed by a lens for two minutes1 during totality1 on a sheet of paper prepared with bromide of silver40 ,no details are given of the apertures of the lenses employed1 or of their focal lengths4 ,at the outset1 therefore1 astronomers were met with failure1 but the failure at ,milan did not deter ,dr4 ,a4 ,h4 ,busch and ,herr ,berkowski from a similar attempt at ,konigsberg on ,july #bh1 #ahea4 ,the telescope used on this occasion had an aperture of #b4d inches1 and a focal length of #cj inches4 ,commencing immediately after the beginning of totality1 a plate was exposed for #hd seconds in the focus of the telescope1 and on development an image of the corona was obtained4 ,a second plate exposed for from #dj to #de seconds was fogged by the sudden breaking out of the sunlight4 ,the picture thus obtained--the first photograph of the corona and prominences--is known as the ,konigsberg ,daguerreotype1 and is still preserved at the ,strasburg ,observatory4 ,it was lent by ,professor ,winnecke for the exhibition of scientific instruments at ,south ,kensington in #ahgf4 ,on it the prominences1 and the lower portion of the corona extending about one-fourth of a solar diameter from the moon's limb1 are distinctly shown1 the encroaching of the prominences on the dark disc of the moon1 owing to irradiation1 being particularly evident4 ,daguerreotype was again used for the annual eclipse of ,may #bf1 #ahed1 by ,mr4 ,campbell and ,professor ,loomis at ,new ,york2 by ,dr4 ,bartlett and ,victor ,prevost1 who obtained nineteen photographs1 at ,west ,point2 and by ,professor ,stephen ,alexander and ,mr4 ,e4 ,h4 ,old at ,ogdensburg4 ,liais in #aheh obtained photographs of the partial phases1 using wet plates4 ,on one of these the moon can be seen projected on the corona before totality4 ,with the introduction of the collodion process more sensitive plates were obtained1 and a great advance was anticipated4 ,at the total eclipse of #ahfj1 ,july #ah1 ,mr4 ,warren de la ,rue1 at ,rivabellosa1 in ,spain1 used wet plates4 ,his instrument was one specially devised by himself for photographing the sun's disc for sun-spots1 and is known as the ,kew heliograph4 ,it is an ordinary equatorial mounting with driving clock1 carrying a photographic object-glass1 #c4d inches clear aperture1 and #ej inches focal length4 ,the primary image is 4#dff of an inch in diameter1 but before the image falls on the plate it is enlarged by an ordinary ,huyghenian eyepiece to #c4h inches diameter4 ,the exposing apparatus for the ordinary sun photographs is an instantaneous shutter2 this1 of course1 had to be abandoned for the eclipse photographs4 ,two plates were exposed during totality1 the exposure being #fj seconds in each case1 but only slight traces of the corona were obtained4 ,at the same eclipse ,father ,secchi and ,professor ,monserat1 working at ,desierto de las ,palmas1 obtained good photographs of the corona1 using an object-glass of 4#ae metre diameter1 and #b4e metres focus1 the primary image being #bc millimetres in diameter4 ,the plates were placed in the primary focus and according to ,secchi1 8all the phases of the phenomena are represented on the photographs40 ,the original negatives obtained at ,desierto de las ,palmas of this eclipse have unfortunately been lost4 ,the next attempt at photographing the corona was on ,august #ah1 #ahfh1 this being remarkable as the first attempt to use a reflector for the purpose4 ,colonel ,tennant and ,sergeant ,phillips at ,guntoor used a #i-;inch silver-on-glass mirror1 by ,with1 of #f feet focal length1 mounted equatorially by ,browning on the ,newtonian plan4 ,unfortunately the weather was unfavorable1 but plates were exposed through light clouds1 the longest exposure being #aj seconds4 ,the photographs obtained show the prominences sharply defined1 but only slight traces of corona are visible4 ,mr4 ,sutton1 at ,mautawali ,kiki1 and ,drs4 ,g4 ,fritsch1 ,h4 ,vogel1 and ,w4 ,zener1 at ,aden1 were1 from atmospheric and other causes1 unsuccessful with refractors4 ,at the eclipse of ,august #g1 #ahfi1 many attempts were made to photograph the corona4 ,in all cases where the image was enlarged before it fell on the plate1 slight traces of the corona were obtained2 while ,professor ,winlock and ,mr4 ,j4 ,a4 ,whipple1 at ,shelbyville1 with a #e-;inch lens of #g feet focal length1 obtained seven pictures taken in the primary focus1 one with #dj seconds' exposure1 showing more detail than had previously been photographed4 ,at this eclipse1 ,messrs4 ,hoover photographed the corona with a lens of #ab inches focus1 and ,professor ,stephen ,alexander also obtained photographs at ,ottumwa some of which give good ideas of the coronal structure4 ,at the #ahgj eclipse1 ,december #bb1 a #d-;inch ,dallmeyer lens 7rapid rectilinear71 stopped down to three inches aperture1 and with a focal length of thirty inches1 was used by ,mr4 ,brothers at ,syracuse4 ,wet plates were used1 and the photographs were taken through light clouds1 the best of the pictures having had eight seconds' exposure4 ,details in the corona are very well shown in these photographs4 ,in discussing his results1 ,mr4 ,brothers says1 8,the photographs taken 444 prove that the light of the corona is very actinic1 and that several photographs of this beautiful phenomenon can be taken during the time of totality40 ,he further adds1 8,that it is impossible to obtain satisfactory photographs of the corona either with reflecting or refracting telescopes as ordinarily used is1 ,i think1 now conclusively proved40 ,professor ,winlock1 at ,jerez1 during the same eclipse1 obtained two good photographs with ordinary telescopes2 while ,lord ,lindsay1 at ,maria ,louis ,observatory1 with a #ab-;inch mirror of #f feet focus1 obtained plates so much fogged as to be useless4 ,on ,december #ba1 #ahga1 splendid photographs were obtained at ,baikul by ,mr4 ,davis 7,lord ,lindsay's observer71 and by ,colonel ,tennant1 ,j4 ,b4 ,hennessey1 ,esq41 and ,captain ,waterhouse1 at ,dodabetta4 ,in each case ,dallmeyer #d-;inch rapid rectilinear lenses of thirty-three inches focus were used1 the exposures varying from five to forty seconds4 ,herr ,dietsch1 in ,java1 also obtained two good photographs with a 8lens of short focus10 with exposures of half and one-third second4 ,captain ,hogg1 at ,jaffna1 also got fair results with cameras #af inches and #bc inches long4 ,at the eclipse of ,april #f1 #ahge1 ,dr4 ,schuster1 in ,siam1 obtained good photographs1 although small1 with an ordinary camera4 ,the eclipse of #ahgh marked another departure in photography4 ,dr4 ,draper used wet plates1 and got much detail in #afe seconds4 ,mr4 ,ranyard used ,mawson ,swan's extra sensitive dry plates1 with a #ac-;inch lens of #f feet #b inches focus1 and obtained photographs extending #f 7one-fifth of a sun's diameter7 from the limb with exposures of one and three seconds4 ,professor ,harkness1 the director of the ,american operations1 arranged two cameras1 with #f-;inch ,dallmeyer lenses of #cg4i-;inch focus1 and ,mr4 ,j4 ,a4 ,rogers and ,mr4 ,clark with these1 using specially prepared dry plates made by ,mr4 ,rogers1 obtained two good series of photographs4 ,in the report on the eclipse operations published from the ,united ,states ,naval ,observatory1 ,mr4 ,j4 ,a4 ,rogers not only discusses the value of photographs as compared with drawings1 but enters fully into all the details of eclipse photography1 concluding by strongly advocating the adoption of dry plates4 ,mr4 ,o4 ,l4 ,peers during this eclipse obtained a wet plate photograph showing greater extension of the corona than any of the dry plate ones1 but there seems some doubt about the apparatus he used4 ,he used either a #b-;inch or #c-;inch ,voigtlander portrait lens1 and exposed either for twelve or for twenty-three seconds4 ,mr4 ,peers says he used a #b-;inch lens1 and twelve seconds' exposure1 while ,voigtlander declares he makes only #c-;inch lenses of the focus #a3h ,mr4 ,peers used1 and on examination of the photograph it is found that the trail of the moon on the plate indicates an exposure of twenty-three seconds4 ,after the #ahgh eclipse dry plates were universally adopted by eclipse observers4 ,the photographic arrangements of the expedition to ,sohag1 in ,egypt1 for the eclipse on ,may #ag1 #ahhb1 were made by ,captain ,abney1 the chief objects of the expedition being to photograph the spectra of the corona and prominences4 ,arrangements were also made by ,captain ,abney for corona photographs with a #d-;inch lens of sixty inches focus belonging to him4 ,the spectrum photographs taken show as many as thirty lines in the prominences1 while the photographs of the corona obtained by ,dr4 ,schuster with exposures of from three to thirty-two seconds show great extension of the corona with the most exquisite detail4 ,these plates are also remarkable for the discovery of a comet in the photographs1 although the comet was not seen by observers4 ,captain ,abney and ,mr4 ,j4 ,norman ,lockyer were responsible for the methods of photographic attack adopted by the ,english observers1 ,messrs4 ,lawrence and ,woods1 at the ,caroline ,islands1 on ,may #f1 #ahhc4 ,the spectroscopic results and the corona photographs taken with the #d-;inch lens of ,captain ,abney1 previously used in #ahhb1 were most successful4 ,janssen on this occasion used two objectives1 one #f-;inch and one #h-;inch diameter1 and using long exposures1 photographed the corona extending two diameters from the sun1 this being much further than it could be traced with a telescope4 ,photography was again used on ,september #h1 #ahhe1 at the total eclipse in ,new ,zealand4 ,at the eclipse of ,august1 #ahhf1 visible at ,granada1 ,captain ,darwin used a chronograph as devised by ,dr4 ,huggins1 consisting of a mirror inclined in a tube in such a manner as to enable photographs to be taken in the primary focus without the intervention of a flat4 ,good results were obtained4 ,dr4 ,schuster and ,mr4 ,maunder used #d-;inch lenses of #fj-;inch focus1 and obtained good results4 ,their spectrum photographs were also successful4 ,professor ,pickering1 of ,harvard1 used a heliostat and a photo-heliograph of #ch feet focus1 supported horizontally1 but no results were obtained with this apparatus1 although he was partially successful with his other instruments4 ,very few photographs were obtained of the eclipse of ,august #ai1 #ahhg1 in ,russia1 owing to the unfavorable weather4 ,the ,english observers intended to use similar instruments to those employed in #ahhf1 but the weather did not permit4 ,the eclipse of ,january #a1 #ahhi1 was very successfully photographed by the ,american observers1 the largest aperture used being thirteen inches4 ,on some of the plates used during this eclipse the standard intensity scale recommended by ,captain ,abney several years ago was fixed1 and for the first time definite conclusions as to the brightness of the corona were obtained4 ,the expedition sent out by the ,royal ,astronomical ,society for the eclipse of ,december #bb1 #ahhi1 were each fitted with a #d-;inch photographic lens1 belonging to ,captain ,abney1 mounted on the usual equatorial plan1 and intended to continue the series so well begun by ,dr4 ,schuster in #ahhb1 and also with a #bj-;inch mirror of #de inches focus1 specially constructed and mounted for eclipse work1 and designed to photograph the outer portions of the corona too faint for ordinary instruments4 ,the plates for use with the #d-;inch lenses were specially prepared by ,captain ,abney1 and on each of them he had placed a scale of standard intensity squares for measuring the brightness of the corona4 ,small squares on each of the plates were exposed to a standard light for various times2 these squares were then covered with a strip of black paper1 and the plates taken out to the ,eclipse ,station and exposed on the corona4 ,when the plates were developed the image of the corona and the squares were1 of course1 developed to the same extent1 the squares thus serving as standards for absolutely measuring the photographic intensity of the light of the corona4 ,the density of the deposit in any part of the picture of the corona can be compared with the density of the most similar of the squares on the same plate by ,captain ,abney's photometer1 and as this photometer depends upon the method of limiting apertures1 it gives absolute readings4 ,the ,african expedition was entirely unsuccessful1 owing to clouds1 but the expedition to ,salut ,isles1 under charge of the late ,father ,perry1 obtained successful photographs1 which are at present under examination4 ,from them ,captain ,abney will be able to measure the absolute photographic intensity of the light of the corona4 ,an ,american expedition was sent to ,cayenne with instruments used on ,january #a1 #ahhi1 and obtained successful photographs1 while an ,american expedition to ,southwest ,africa was unsuccessful1 for the reason already given4 ,this expedition1 under the direction of ,professor ,david ,p4 ,todd1 was located at ,cape ,ledo1 about half a mile from the ,english ,eclipse ,station4 ,several new departures in eclipse photography were introduced4 ,chief amongst these was the remarkable apparatus by means of which no less than twenty-three objectives and two mirrors were accurately pointed at the sun and caused to follow it by one large clock4 ,a large duplex polar axis 7the old ,english form as used for the #ab4e inch reflector at ,greenwich7 was mounted on solidly constructed stone piers and very carefully adjusted4 ,this axis is constructed of #f-;in4 wrought-iron tubing1 the total weight being about #bjjj lbs4 ,in it the cameras were fixed by set screws1 the optic axis of the instruments being adjusted parallel to each other1 and at an angle equal to the south polar distance of the sun at the time of totality4 ,the carefully regulated and very powerful clockwork attached to the instrument caused the polar axis to rotate1 and thus the whole battery of instruments followed the sun4 ,each lens was fitted with a pneumatic shutter regulated to give the required exposure in each case4 ,the cameras themselves were enclosed in a dark-room1 the lenses only being exposed to the sun1 so that dark slides were not required1 the plates being held on open rotating frames1 these frames being rotated at the proper time by pneumatic arrangements4 ,when the cameras were once pointed1 and the clock driving properly1 all the operations of exposure and changing of plates were performed without personal superintendence by means of the pneumatic apparatus1 and a chronograph attached to the valve system of this apparatus recorded the exact time at which each exposure was begun and ended4 ,it is to be regretted that this ingenious and elaborate apparatus did not have a satisfactory trial1 owing to the dense clouds2 but ,professor ,todd assures us that he was thoroughly satisfied with the success of the pneumatic movements during the three minutes ten seconds he brought it into operation at the time of totality4 ,it is not improbable that 7in spite of the great strength and weight of the axis and the solidity of the supporting piers7 with this plan of fixing a large number of cameras and spectroscope on one polar axis1 the constant opening and shutting of shutters1 and the changing of the plates1 may produce so much shake that none of the long exposure photographs will be satisfactory4 ,this1 of course1 can only be ascertained by the use of the instrument on the corona1 and several years must elapse before the trial can be made4 ,another unusual instrument was a photo-heliograph of five inches aperture and forty feet focus1 mounted on a combination of the equatorial stand and tripod4 ,the long tube was made of iron1 coiled spirally and strongly riveted1 the necessary rigidity being attained by strong wires extending from end to end1 and tightly stretched by a disc in the middle of the tube4 ,close to one end of the tube the polar axis was attached by a universal joint2 the other end of the tube being supported by two rods1 one on the east and one on the west side1 these rods being also attached by universal joints4 ,by means of these rods the proper inclination was given to the tube4 ,the east rod was the declination rod1 and was capable of sliding along the polar axis4 ,the west rod was for giving motion in right ascension1 being terminated at the free end in the form of a piston of a sand clock fixed in an inclined position4 ,the rate at which the sand escaped from the cylinder could be accurately regulated1 so that the rate of descent of the piston was completely under control1 and was1 of course1 such as would cause the instrument to follow the sun4 ,this instrument was erected at ,cape ,ledo1 close to a hill of such inclination that the sun could be followed during the whole of the eclipse1 while the long tube could be manipulated with greater advantage than would have been possible if the instrument had been erected on level ground4 ,the hot air rising from the heated hill probably affected the definition in the photographs1 but under the circumstances that could scarcely be avoided4 ,this form of mounting certainly solved the question of the possibility of using long-focus lenses mounted as direct photo-heliographs1 but the apparatus is certainly unwieldly1 and was only got into the fit state that it was on the eclipse day by the very great care and patience of ,professor ,bigelow4 ,as it was intended principally to photograph the partial phases of the eclipse with this instrument1 instantaneous exposures were arranged for1 but ,professor ,bigelow succeeded so well in the adjustment of the instrument and the regulation of the sand clock1 that he would have tried to obtain photographs of the lower corona with it had the weather permitted4 ,the photographic apparatus on this instrument has a very ingeniously constructed revolving plate holder1 carrying round plates of twenty-two inches diameter4 ,the exposing apparatus and the apparatus for rotating the plate between the exposures were moved by pneumatic arrangements1 exposures being made at intervals of six seconds1 the exact time of each being recorded on a chronograph4 ,as no dark slides were used1 it was necessary to enclose the whole of the photographic apparatus in a dark-room4 ,one hundred and ten exposures were made with this telescope during the partial phases of the eclipse1 all the photographs taken having to be obtained through clouds4 ,in several expeditions previous to this1 where more than one kind of observation has been required1 two or more objectives have been mounted on the same stand and driven by the same clock2 but this plan is always open to the objection that any accidental disturbance in the manipulation of one of the pieces of apparatus will most probably spoil the results for both4 ,with the ,american plan of many objectives on one heavy axis1 and a pneumatic apparatus to manage all the actual operations of exposures and changing of plates1 this objection of possible accidental disturbance is to some extent overcome2 but the shake of the many operations taking place on the one axis introduces another risk4 ,beside this1 the apparatus is very heavy1 and exceedingly difficult to transport and erect1 even in a civilized country4 ,such is a very summarized account of the instruments hitherto employed1 and it seems to me that the time has now come when much can be gained by the employment of fixed instruments and a moving large plane mirror4 ,this idea of using a heliostat is1 of course1 not new1 for it has been used several times on a small scale1 and for special purposes4 ,there is nothing beyond the difficulty of making a plane mirror sufficiently large for the work to prevent the adoption of this method in the future2 and this difficulty now has ceased1 as it is only a matter of time and labor to make plane mirrors of sufficient size4 ,with a large plane mirror1 twenty inches or upwards in size1 mounted on a heliostat mounting1 and so arranged as to reflect sunlight into a series of instruments rigidly supported in a horizontal position1 the difficulties of eclipse observers will be very considerably lessened4 ,the one driving clock will keep the pencil of light constantly in the same direction1 and this can be used partly for photographing the corona1 partly for spectroscopic work1 partly for polariscopic observations1 and so on for any other purposes1 the whole of the instruments being fixed in the best possible positions for the observers4 ,practically1 with a large flat mounted in the manner indicated1 we can fix any portion of the sky we require to observe1 and to do it we can point as many instruments as we can crowd into the pencil1 each instrument being quite independent of the others4 ,the length of focus of an objective would not introduce any difficulties on this plan1 for the length of the tube is of little importance when it can be fixed in an horizontal position4 ,the observers at the ,eclipse ,station only have one astronomical adjustment to make1 i4e41 that of the position of the heliostat1 and only one driving clock to regulate4 ,this clock1 since it has only to move the weight of the plane mirror and its mounting1 can be more accurately made and regulated than is possible with a clock when it has to carry the weight of the tube and heavy axis of an ordinary telescope4 ,the positions of the observers are more easy and natural during the precious seconds of totality2 or1 if personal superintendence is to be abolished in favor of the ,american pneumatic apparatus1 this suggested arrangement of the instrument is better fitted for the pneumatic attachments than the old plan is4 ,the whole of the photographic apparatus can be fixed up in a dark hut or under a dark tent with far less trouble and risk of stray light than is possible with the old manner of mounting4 ,the cost of a good heliostat mounting is about the same as that of a good telescope1 and with one heliostat we can do the work of at least half a dozen of the usual instruments4 ,a4 ,a4 ,,common1 ,f4,r4,s41 and ,a4 ,,taylor1 ,a4,r4,s4,m4 99 99 99 99 99 ,,the ,supreme ,court at ,st4 ,paul1 ,minnesota1 handed down a decision on ,july #ast in the case of ,ida ,moore1 of ,minneapolis1 against ,photographer ,rugg4 ,rugg sold a copy of ,mrs4 ,moore's picture1 which was put on exhibition in improper places1 much to the discredit of the lady1 and she brought suit for damages4 ,the ,supreme ,court holds that it is a case in which there is ground for the recovery of damages2 that the photographer has no right to dispose of pictures which are the sole property of the sitter4 ,the decision is an important one4 ,similar cases have arisen once or twice previously in other parts of the country4 ,,general ,,notes4 ,a ,,novel ,,carbon ,,process4--,mr4 ,o4 ,volkner publishes the following dust carbon printing process1 which appears to be easy to carry out1 requires no reversed negatives1 and yields permanent prints4 ,we also think it can be used in making phototypic printing blocks4 ,make a solution of gelatine in water #a-fj1 and draw sheets of good strong paper through it1 and hang it up to dry4 ,wet it again and squeeze it down on a piece of glass4 ,now brush over it a solution of ten parts gelatine1 ten parts gum arabic1 twenty parts white sugar1 eighty parts distilled water4 ,while still quite moist put it in a dusting box 7such as used for photogravure7 which contains a mixture of #ajj parts of white dry sugar and five parts of ,french lamp black4 ,after a lapse of eight to ten minutes1 withdraw it and you will find it covered with innumerable particles of dust4 ,paper thus prepared will keep1 and has to be sensitized in a bath of fifty parts bichromate of potassium1 fifty parts bichromate of ammonia1 six thousand parts water and aqua ammonia1 until it assumes a light yellow color1 and at last1 to avoid the too quick dissolution of the gum arabic1 immerse in twenty parts chromic acid in #a1ejj alcohol4 ,print by ,vogel's photometer #af to #ah4 ,to develop1 use warm water first1 and afterwards cold1 leaving the print for several hours in water1 to which may be added a little aqua ammonia1 in case the printing was carried too far4 ,the prints show a singular and very pleasing grain and need no transferring4--,dr4 ,eder's ,jahrbuch4 99 99 99 99 99 ,,every photographer is1 no doubt1 to his own sorrow1 familiar with a yellow stain in the negative1 caused by taking the plate from the fixing bath before it is thoroughly fixed4 ,mr4 ,belitski1 the well-known photo-chemist1 made some experiments recently to remove this stain1 and succeeded very well4 ,a slight stain can often be removed by placing the negative in the following solution3 #ej parts alum1 #ajjj parts water1 #aj parts bichromate of potassium1 #bj parts muriatic acid4 ,after several minutes the negative turns yellow all through4 ,it is washed now very thoroughly1 exposed to sunlight for several minutes1 and developed or blackened with the ordinary iron developer4 ,when the stain is very intense this remedy will not prove to be of any avail1 and only by leaving it for twenty-four hours in the ,lainer acid fixing bath 7so often described in all journals recently7 he succeeded in removing the stain and saving a valuable negative4--,deutsche ,photographen ,zeitung4 99 99 99 99 99 ,,the article on 8,fixing ,plates0 which appeared in our ,june number1 page #afc should read in the heading 8,fixing ,prints40 ,our readers have doubtless discovered this for themselves before now4 ---------------------------------------- -------------------------------- ,,transcriber',s ,,notes #a4 ,silently corrected typographical errors and variations in spelling4 #b4 ,retained anachronistic1 non-standard1 and uncertain spellings as printed4 #c4 ,enclosed italics font in underscores4