,catalog ,a4 #aijh4 ,,a/ronomical ,,in/rum5ts 444 ,,& 444 ,,accessories4 ,illu/ration ,,wm4 ,,ga]tn] ,,co4 #ecde-ecdi ,lake ,ave4 ,,*icago4 ,catalog ,a4 #aijh4 ,,a/ronomical ,,in/rum5ts 444 ,,& 444 ,,accessories4 ,illu/ration ,,wm4 ,,ga]tn] ,,co4 #ecde-ecdi ,lake ,ave4 ,,*icago4 ,notice4 ,?is catalogue sup]s$es =m] editions4 ,! prices giv5 9 ?is catalogue are net & d n include pack+ :i* w be *>g$ at co/4 ,to avoid mi/akes & delays :5 ord]+ please give catalogue numb] & %ipp+ in/ructions4 ,mo/ ( ! in/rum5ts li/$ 9 ?is catalogue are con/ruct$ to ord] only b ! small] sizes ( telescopes ) accessories1 *ronographs1 simpl] measur+ ma*9es1 etc41 are usually kept 9 /ock4 ,! app>atus li/$ 9 ?is catalogue is ( our own manufacture1 except+ ! a/ronomical regulator clocks1 :i* we h li/$ = ! conv5i5ce ( our cu/om]s4 ,all ord]s w be fill$ z promptly z possible ) due reg>d to ?or\gh workman%ip & effici5t inspection4 ,ev]y?+ t leaves our e/abli%m5t is c>efully te/$ & inspect$ & we c gu>antee our app>atus to be1 9 e respect1 fully z repres5t$4 ,any piece1 :i* does n come up to ! mo/ exact+ requirem5ts w always be promptly replac$ )9 ! %orte/ possible "t4 ,we %all be glad to satisfy any special requirem5ts ( our cu/om]s & w make any desir$ alt]ations & additions on ! /&>d designs4 ,introduction4 ,9 ! foll[+ pages we h endeavor$ to give to our cu/om]s an idea ( ! l9e ( a/ronomical in/rum5ts ( ! late/ & mo/ improv$ types :i* we h con/ruct$ = "s ( ! lead+ obs]vatories z m5tion$ 9 ! text4 ,we feel t ?is s]ies ( illu/rations may n only be ( g5]al int]e/1 b also ( s]vice 9 help+ to det]m9e fur!r developm5ts ( mod]n a/ronomical & a/rophysical equipm5t4 ,we h n ?\ght x advisable to describe 9 detail ! v>i\s in/rum5ts ( precision1 :i* we h be5 call$ ^u to con/ruct f "t to "t = ! sci5ti/s 9 ! a/ronomical z well z o!r bran*es ( sci5ce dur+ ! la/ t5 ye>s4 ,z a rule e a/ronom] is int]e/$ 9 "s special l9e ( rese>*1 :i* = a successful inve/igation requires a special adaptation ( ! in/rum5t he proposes to use1 & 9 su* cases we are confid5t we c fill ! requirem5ts & %all be happy to correspond ) int]e/$ p>ties4 ,we are 9 position to und]take ! design ( special app>atus & c furni% sket*es & e/imates 9 accordance ) ! sugge/ions ( ! cu/om] on %ort notice 9 su* cases1 :]e ! importance ( ! prospective bus9ess w w>rant x4 ,among ! v>i\s in/rum5ts :i* we h built1 b :i* are n includ$ 9 ?is catalogue1 we wi% to m5tion1 spectroheliographs1 planet>y cam]as1 photographic plate hold]s1 domes = obs]vatories1 etc4 ,! optical p>ts :i* we furni% are ( ! highe/ degree ( excell5ce & are made = u by sev]al ( ! mo/ reliable firms 9 ?is l9e4 ,mr4 ,o4 ,l4 ,petitdidi] is closely locat$ to our works1 & dur+ ! la/ t5 ye>s has suppli$ mo/ ( our objectives1 etc4 ,x is & has be5 ! aim ( our firm to produce app>atus ( ! highe/ grade & ! con/ant gr[? ( our bus9ess is a mute b eloqu5t te/imonial t our ef=ts h be5 appreciat$ by our cu/om]s4 ,we are glad to ackn[l$ge our indebt$ness to _m ( ! =emo/ a/ronom]s1 :o h greatly assi/$ u by sugge/ions z to _! p>ticul> requirem5ts1 & by supply+ c]ta9 ( ! photographs "h reproduc$4 ,we take ?is opportunity to ?ank our cu/om]s = ! favors r5d]$ u 9 ! pa/1 & tru/ t 9 ! future ^! mutually pleasant relations may be r5ew$4 ,illu/ration3 ,a #aja ,a#aja4 ,alt-,azimu? ,m\nt+ on /rong h>dwood tripod4 ,! v]tical & horizontal axis h l>ge be>+ surfaces1 assur+ /ability & /ead9ess ( motion4 ,all p>ts except+ ! tripod head are made ( brass & are nicely f9i%$4 ,! telescope is fitt$ ) long rack & p9ion motion4 ,?ree cele/ial eye pieces are includ$4 ,price ) #b #a_/b telescope #ij4jj ,a#ajb4 ,! same z above ) #c telescope4 ,price #aaj4jj ,a#ajc4 ,! same z above ) #c #a_/b telescope4 ,price #adj4jj ,a#ajd4 ,! same z above ) #d telescope4 ,price #bjj4jj ,note4--,all our a/ronomical telescope h objectives ( ! /&>d focal l5g? 7focus to ab\t #ae times diamet] ( ap]ture74 ,! objective is m\nt$ 9 ! mo/ approv$ mann] & is provid$ ) adju/m5t = collimation4 ,note4--,= accessories to ^! telescopes see page #aa4 ,illu/ration3 ,a #aaj ,a#aaj4 ,univ]sal ,equatorial ,m\nt+4 ,?is =m ( m\nt+ c be us$ equally well = cele/ial & t]re/rial obs]vations4 ,! m\nt+ is made to swivel on ! tripod head1 9 ord] to set ! in/rum5t 9 ! m]idian4 ,! pol> axis c be set at any latitude & a graduat$ arc gives ! exact position4 ,! in/rum5t is set level by means ( two small levels atta*$ to ! tripod top4 ,! pol> axis is fitt$ ) worm :eel & worm = sl[ motion4 ,! h&le ) ! univ]sal jo9t c be clamp$ on ei!r side ( ! worm %aft4 ,telescope ( #c ap]ture & ?ree eye pieces4 ,price #afe4jj ,a#aaa4 ,same z above ) #c #a_/b telescope4 ,price #aij4jj ,a#aab4 ,same z above ) #d telescope4 ,price #bej4jj ,= accessories see page #aa4 ,illu/ration3 ,a #abj ,a#abj4 ,portable ,equatorial ,m\nt+ ) ,driv+ ,clock4 ,?is in/rum5t 0 design$ to meet ! dem& = portable l[ pric$ telescope suitable = ! /udy ( a/ronomy 9 ! college1 high s*ool or = ! amateur a/ronom]4 ,e obs]v] & tea*] 9 a/ronomy w appreciate ! great usefulness ( a driv+ me*anism1 :i* w keep ! /> 9 ! field dur+ obs]vation4 ,aft] sev]al ye>s ( exp]im5t+ we h succe$$ 9 con/ruct+ a reliable clock :i* c easily be atta*$ to our portable telescope m\nt+4 ,! in/rum5t is m\nt$ on /rong h>dwood tripod fitt$ ) iron %oes4 ,x is atta*$ to ! tripod top by a s+le screw :i* holds x firmly & all[s adju/m5t 9 azimu?4 ,! clock case c>ry+ ! be>+ = ! pol> axis is made to swivel 9 ! base ca/+1 s t ! pol> axis may be easily set & firmly clamp$ at an angle f horizontal to v]tical4 ,a level is fitt$ to ! tripod top & a graduat$ arc is fa/5$ to ! clock case4 ,if ! pol> axis is set v]tical & ! worm :eel unclamp$1 ! in/rum5t is trans=m$ into an alt-azimu? m\nt+4 ,?is feature w be f\nd to be a great conv5i5ce especially = t]re/rial obs]vations4 ,bo? ! pol> & decl9ation axes are c>efully fitt$ to _! be>+s & c>ry f9d+ circles4 ,! "r asc5sion circle reads to #e m941 ! decl9ation circle to s+le degrees4 ,! decl9ation axis is fitt$ ) clamp screw :i* is )9 conv5i5t rea*4 ,! clock has ample p[] & is enclos$ 9 a heavy case :i* protects x f du/ & injury4 ,x is driv5 by two /rong spr+s & w run ab\t #ab h\rs )\t rew9d+4 ,a lev] = />t+ or /opp+ is provid$4 ,motion f clock to pol> axis is transmitt$ by means ( a set ( bevel ge>s & worm & worm :eel4 ,! worm :eel is held by friction to ! pol> axis s t ! telescope c be mov$ )\t loos5+ any screw & )\t affect+ ! clock4 ,! clock w give /eady & accurate motion to ! telescope & ) ord9>y c>e x w keep 9 good repair = ye>s4 ,a sl[ motion adju/m5t indep5d5t ( ! clock is fitt$ to ! pol> axis4 ,) ! in/rum5t are furni%$ ?ree cele/ial eye pieces giv+ a magnify+ p[] ( ab\t #ej1 #ajj & #aej diamet]s respectively4 ,! in/rum5t is easily portable1 ! total weight ( a #c telescope be+ ab\t #fj lbs4 yet x is made heavy en\gh1 & ! mat]ial well di/ribut$ to insure /r5g? & /ead9ess4 ,workman%ip & f9i% ( ! in/rum5t are ! be/4 ,! brass p>ts are ei!r lacqu]$ yell[ or bronz$4 ,! iron p>ts are durably enamel$ & all expos$ /eel p>ts are nickel-plat$4 ,a#abj4 ,telescope ( #c ap]ture4 ,price #aij4jj ,a#aba4 ,telescope ( #c #a_/b ap]ture1 ! same z above b ! be>+ p>ts made proportionally heavi]4 ,price #bdj4jj ,a#abb4 ,telescope ( #d ap]ture4 ,price #cbj4jj ,= accessories see page #aa4 ,note4--,an iron column c be provid$ = above telescopes 9 place ( ( ! tripod1 at an extra co/ ( #bj4jj4 ,illu/ration3 ,a #acj ,,equatorial ,,m\nt+s ,,on ,,iron ,,pill> ,,) ,,driv+ ,,clock1 ,,etc4 ,on page #aj is %[n an illu/ration ( our /&>d high grade type ( #f 94 equatorial4 ,a description ( ! same w apply to practically all l>g] & small] sizes4 ,! pill> is ( rectangul> cross section & well proportion$4 ,! clock case is securely fa/5$ to ! top ( ! pill> b ) provision = adju/m5t 9 azimu?4 ,! clock has ample driv+ p[]1 is v c>efully con/ruct$ & regulat$ by friction gov]nor 7,design ,pr(4 ,"y47 ,ma9ta9+ ge>s are provid$ on ! ma9 %aft :i* all[s ! w9d+ ( ! clock )\t ret>d+ motion4 ,worm :eel & worm are c>efully cut1 & protect$ by brass %ields4 ,"r asc5sion & decl9ation circles h f9e graduation on solid silv] & co>se f9d+ graduation on ! edge4 ,electric illum9ation & magnify+ glasses are fitt$ to ! v]ni]s4 ,! h&les = all clamps & sl[ motions are fa/5$ conv5i5tly ne> ! eye end ( ! telescope & are ( diff]5t %ape s z to di/+ui% 9 ! d>k "r asc5sion & decl9ation4 ,! axes are ( tool /eel c>efully fitt$ to _! be>+s1 & on ! l>g] in/rum5ts friction roll]s are fitt$ to ! pol> axis4 ,! telescope tube is made ( /eel1 light b /rongly con/ruct$4 ,! eye end has long & heavy rack & p9ion motion & ! :ole c be easily remov$4 ,note4--,! f9e divid$ circles are (t5 omitt$ on small] equatorials1 z !y are n ess5tial1 ! electrical illum9ation = ! circles is also left (f1 & ?is w am\nt to a mat]ial sav+4 ,a#acj4 ,equatorial ,m\nt+ ) #e 94 ,telescope4 ,accord+ to above description ) fir/ class objective1 & five eye pieces4 ,price #iej4jj ,! same in/rum5t )\t f9e circles & electrical illum9ation4 ,price #hbe4jj ,a#aca4 ,equatorial ,m\nt+ ) #f 94 ,telescope4 ,complete z ,a#acj4 ,price #aejj4jj ,a#acb4 ,equatorial ,m\nt+ ) #h 94 ,telescope4 ,same z above4 ,price #bejj4jj ,a#acc4 ,equatorial ,m\nt+ ) #i 94 ,telescope4 ,same z above4 ,price #ccjj4jj ,a#acd4 ,equatorial ,m\nt+ ) #aj 94 ,telescope4 ,same z above4 ,price #cgjj4jj ,a#ace4 ,equatorial ,m\nt+ ) #ab 94 ,telescope4 ,same z above4 ,price #eejj4jj ,note4--,we are equipp$ to con/ruct l>g] in/rum5ts & are glad to give prices on application4 ,illu/ration3 ,a #aca ,illu/ration ,! above cut %[s a driv+ clock = our /&>d #f 94 telescope4 ,we h con/ruct$ clocks = a numb] ( l>g] telescopes among o!rs ! clock = ! #bd 94 ,l[ell ,refractor4 ,,accessories ,,to ,,telescopes ,a#aja ,,to ,a#ace4 ,a#adj4 ,f9d] fitt$ to #c telescope4 ,price #ab4jj ,a#ada4 ,f9d] fitt$ to #c #a_/b telescope4 ,price #ae4jj ,a#aej4 ,positive ,eye ,pieces4 7,ramsd571 focus #f mm4 to #be mm4 ,price #d4ej ,a#aea4 ,negative ,eye ,pieces4 7,huyg5ian71 focus #e mm4 to #be mm4 ,price #d4ej ,a#aeb4 ,diagonal ,eye ,piece4 ,! prism ( ! eye piece has gu>ante$ optically plane surfaces & w n affect ! def9ition ( ! telescope4 ,price #ab4jj ,a#aec4 ,t]re/rial ,eye ,piece1 focus #be mm4 ,price #ab4jj ,a#aed4 ,sun ,caps1 to fit above eye pieces4 ,price #a4ej ,! outside diamet] ( all our eye pieces is #a #a_/d except+ ^? us$ 9 our ,micromet]s4 ,illu/ration3 ,a #bja ,a#bja4 ,position ,micromet]s = #f to #h ,telescopes4 ,circle #ae cm4 diamet]1 divisions on solid silv]1 v]ni]s read+ to #f m941 sl[ ge> motion = rotat+1 electrical illum9ation1 provid$ ) diff]5t color scre5s4 ,screw gu>ante$ ( highe/ accuracy4 ,price #bjj4jj ,a#bjb4 ,position ,micromet]s = #d to #e ,telescopes4 ,simil> to above b rotation by h& & con/ruction some:at simpl]4 ,price #ajj4jj ,illu/ration3 ,a #bjc ,a#bjc4 ,small ,position ,micromet] = #c to #d ,telescopes4 ,circle reads to s+le degrees4 ,electric illum9ation4 ,price #ge4jj ,illu/ration3 ,a #cja ,transit ,in/rum5t1 ) rev]s+ arrangem5t1 illum9ation ) oil or electric lamp1 ,fil> micromet] ) two eye pieces4 ,weight ( axis balanc$ by spr+s & roll]s4 ,! circle has a diamet] ( #aej mm41 v]ni]s read to #bj seconds4 ,! in/rum5t is m\nt$ on an iron base plate1 :i* is fitt$ ) azimu? adju/m5t 7n %[n 9 cut74 ,a#cja4 ,transit ) #b ,telescope4 ,price #eej4jj ,a#cjb4 ,transit ) #c ,telescope4 ,price #hjj4jj ,illu/ration3 ,a #dja ,a#dja4 ,univ]sal ,in/rum5t4 ,telescope ) objective prism4 ,v]tical circle has a diamet] ( #ac cm4 is divid$ to #aj m94 & reads by means ( two micromet] microscopes to #aj sec4 ,! telescope is fitt$ ) h>d phosphor bronze be>+ r+s & is rev]sible4 ,ap]ture ( objective is #cj mm4 ,two eye pieces are furni%$ giv+ magnification ( #bj & #cj diamet]s4 ,! prism has absolutely plane surfaces & w n affect ! def9ition4 ,/rid+ level reads to #b sec4 ,! horizontal circle is protect$ & reads by means ( two v]ni]s to #a m94 ,! in/rum5t is pack$ 9 a light b /rong case4 ,price complete ) tripod #dbj4jj ,note4--,?is in/rum5t 0 fir/ con/ruct$ = ,mr4 ,e4 de ,k4 ,leff+well1 :o has f\nd x v satisfactory = 8 "w 9 ! pol> regions4 ,illu/ration3 ,a #eja ,a#eja4 ,zoelln] ,a/rophotomet]4 ,! in/rum5t is made to atta* to ! eye end ( ! telescope & may be us$ ) any size ( refractor or reflector4 ,an axis p>allel to ! telescope tube all[s ! in/rum5t to rotate z a :ole4 ,a clamp is provid$ to hold x 9 position4 ,! artificial /> is =m$ by a small inc&esc5t lamp :i* is adju/able 9 any direction1 & 9 front ( :i* is m\nt$ a small diaphragm4 ,! color *ang+ device1 consi/+ ( ,nicol prism & qu>tz plate1 is fitt$ ) a divid$ circle read+ to s+le degrees4 ,! circle revolv+ ) ! ,nicol prism = *ang+ ! int5sity ( ! />1 has a diamet] ( #ad cm4 & reads by means ( two v]ni]s to #f m94 ,a concave l5s is m\nt$ 9 ! pa? ( ! artificial /> to make ! light div]g+ at ! prop] angle & a plane p>allel plate is adju/ably fix$ 9 ! c5t] ( ! box 9 ord] to ?r[ ! light 9 ! eye piece4 ,an a*romatic objective 9 front ( ! eye piece br+s ! images ( ! real & artificial /> to a focus 9 ! same plane4 ,price #aej4jj ,illu/ration3 ,a #fja ,illu/ration3 ,a #fjb ,a#fja4 ,small ,spectroscope4 ,suitable = telescope f #c to #f 94 ap]ture4 ,! collimator & obs]v+ telescope h an ap]ture ( #be mm41 focus ( #bjj mm4 ,bo? are fitt$ ) rack & p9ion4 ,! spectroscope may be us$ ) a grat+ or a #fj degree prism1 & = ?is purpose has op5+s = ! telescopes at ! prop] angles4 ,a position circle ( #ge mm4 diamet]1 read+ to degrees1 is fitt$ to ! in/rum5t4 ,! slit has micromet] head4 ,price1 )\t grat+1 b includ+ #fj degree prism #ge4jj ,note4--,?is spectroscope c also be us$ on a support = laboratory "w4 ,support = above spectroscope4 ,price #d4ej ,a#fjb4 ,spectroscope = telescopes f #f 94 to #ah 94 ap]ture & detail$ description on application4 ,illu/ration3 ,a #gja ,a#gja4 ,*ronograph = physical & a/ronomical "w4 ,?is *ronograph is design$ to meet ! dem& = a m$ium siz$1 well-made & accurate in/rum5t ( ?is k9d & has giv5 v good satisfaction4 ,! cyl9d] is #ae cm4 9 diamet] #be cm4 long1 driv5 by /rong1 c>efully made clock "w1 fitt$ ) friction gov]nor4 ,two diff]5t spe$s = ! cyl9d] c be obta9$ by means ( *ange ge>s4 ,! sl[ spe$ ( ! drum is "o revolution p] m9ute1 & at ?is spe$ ! drum w run = a full h\r4 ,! fa/ spe$ is #cj seconds p] revolution4 ,! c>riage is driv5 by means ( a screw1 ! nut ( :i* is made to dis5gage easily4 ,price ( ! in/rum5t complete ) two p5s & glass cov] #bbe4jj ,a#gja;a4 ,*ronograph1 ! same z ,a#gja b ) only "o p54 ,! c>riage is s con/ruct$ t a second p5 c easily be add$ lat]4 ,price ) glass cov] #aie4jj ,note4--,e in/rum5t is c>efully te/$ be=e be+ s5t out & we c gu>antee ! spe$ n to v>y ov] #a-bj second dur+ ! full run ( "o h\r4 ,l>ge temp]ature *anges w n affect ! spe$ ( ! clock4 ,a l>ge numb] ( ! *ronographs are 9 use & h giv5 excell5t satisfaction4 ,illu/ration3 ,a #gjb ,a#gjb4 ,pr(4 ,g4 ,w4 ,h\gh's ,pr9t+ ,*ronograph4 ,! in/rum5t consi/s ( two c>efully & accurately con/ruct$ clock movem5ts1 :i* are driv5 by gravity & controll$ electrically by ! sid]eal clock4 ,! movem5ts revolve ?ree type :eels4 ,"o ( ^! turns once p] second1 its edge is divid$ 9 #ej p>ts & x is driv5 by a sep>ate movem5t4 ,! second :eel turns once p] m9ute & ! ?ird once p] h\r & !y w pr9t ! seconds & m9utes1 :ile ! fir/ w give ! hundr$?s ( seconds4 ,a /rip ( pap] is c>ri$ ov] ^! :eels & mov$ =w>d by ! same electro-magnet1 :i* op]ates ! pr9t+ hamm]s4 ,! pap] is suffici5tly long = #abjj obs]vations includ+ spac+ betwe5 records4 ,! op]ation ( ! pr9t+ hamm]s is su* t ! uni=m motion ( ! type :eel is n di/urb$ 9 ! act ( pr9t+4 ,! :ole in/rum5t is m\nt$ on a heavy slate plate #de cm4 by #fj cm41 & protect$ by a glass cov]4 ,! manipulation ( ! app>atus is extremely simple & conv5i5t & ! records obta9$ are p]fectly reliable & accurate )9 ab\t #j4ja ( a second4 ,! sav+ ( "t & labor by ! pr9t+ *ronograph is v consid]able & ! fil+ ( ! records v conv5i5t4 ,?is pr9t+ *ronograph has be5 9 use at ! ,de>born ,obs]vatory = ab\t tw5ty ye>s & dur+ ! la/ five ye>s ! foll[+ obs]vatories h be5 equipp$ ) ! in/rum5t3 ,amh]/ ,college ,obs]vatory2 ,case ,s*ool ( ,appli$ ,sci5ce1 ,clevel&2 ,philadelphia ,obs]vatory2 ,durham ,obs]vatory1 ,durham1 ,engl&2 ,obs]vatory ( ,la,platta1 ,arg5t9e2 & ,dom9ion ,obs]vatory1 ,ottawa1 ,canada4 ,pr(4 ,h\gh has k9dly cons5t$ to inspect e *ronograph be=e x leaves our %op4 ,price1 complete on /&1 glass cov]1 etc4 #ejj4jj ,illu/ration3 ,a #hja ,illu/ration3 ,a #hjb ,a#hja4 ,laboratory ,clock4 ,?is is an eight-day clock2 has a movem5t ( ! be/ workman%ip1 is driv5 by two /rong spr+s1 & keeps accurate "t4 ,! dial is #ab in*es 9 diamet] & has h\r1 m9ute & second h&s4 ,p5dulum beats seconds & makes electric contact by means ( an adju/able m]cury cup4 ,x is m\nt$ 9 a h>dwood case ) glass door4 ,price #bg4jj ,a#hjb4 ,laboratory ,clock4 ,! same z prec$+ "o1 b ) bett] clock movem5t1 gravity driv54 ,price #ce4jj ,a#hjc4 ,regulator ,clock4 ,?is clock has a fir/-class eight day movem5t ) cut /eel p9ions4 ,x is fitt$ ) m]cury comp5sation p5dulum & electrical seconds contact4 ,price #bjj4jj ,note4--,we c furni% free ( duty to educational in/itutions a/ronomical precision clocks made by ,c4 ,riefl]1 ,g]many1 & w be pleas$ to quote prices to int]e/$ p>ties4 ,illu/ration3 ,a #abjj ,a#abjj4 ,simple ,comp>ator4 7,fig4 ,a#abjj47 ,built up ( ,micromet] ,slide ,m#cja & ,microscope ,m#aja1 ) support ,m#caj ,fitt$ ) ,/age4 ,! /age is #aej mm4 long & provid$ ) clips = hold+ objects1 su* z spectrum photographs1 scales1 etc41 & is fitt$ ) illum9at+ mirror4 ,price #de4jj ,a#abja4 ,small ,comp>ator4 ,! in/rum5t is int5d$ = measur+ spectra photographs1 grat+s1 divid$ scales1 or su* objects :i* c be focus$ by ! microscope & w all[ rapid measurem5ts ( ! highe/ possible accuracy4 ,! measurem5t dep5ds on ! accuracy ( ! micromet] screw1 :i* is cut & correct$ ) great c>e4 ,! screw has a pit* ( 4#e mm4 & diamet] ( #ae mm4 ,! index head atta*$ to ! screw is ( consid]able diamet] s z to all[ ! direct read+ ( 4#jja mm4 ,! head is divid$ on solid silv] 9 #ejj p>ts1 & c>ries two r[s ( figures indicat+ ! fir/ & second half ( ! mm4 ,! full mm4 are read by means ( a scale 9 front ( ! in/rum5t4 ,! b$ plate is heavy1 ( ca/ iron1 & ! guides are c>efully scrap$ true )9 #j4jja mm4 ,! c>riage has a movem5t ( #hj mm41 is made ( gun metal & fitt$ exactly to ! guides2 x is also provid$ ) a second or top c>riage ) #dj mm4 motion4 ,! top c>riage c be mov$ by h& & accurately set by means ( a micromet] screw4 ,! microscope is ( v>iable magnify+ p[]1 focus$ by rack & p9ion4 ,illum9ation = transp>5t objects is giv5 f bel[ by means ( a plane mirror4 ,! in/rum5t is m\nt$ on heavy supports1 "u an angle to make x conv5i5t = ! obs]v]4 ,! in/rum5t is f9i%$ 9 fir/-class mann]1 & ! iron b$ plate heavily copp] & nickel plat$4 ,! design ( ?is ma*9e 0 sugge/$ by ,pr(4 ,edw9 ,fro/ ( ! ,y]kes ,obs]vatory1 :]e a numb] ( ^! ma*9es h be5 9 con/ant use dur+ ! la/ five ye>s4 ,c>eful te/s h %[n ! screw accurate )9 4#jjjc ( a mm4 ?r\gh\t ! full l5g?4 ,price #age4jj ,note4--,! micromet] on microscope z %[n 9 cut is n furni%$ ) in/rum5t4 ,a tang5t screw = revolv+ ! eye piece ) ! spid] ?read c be atta*$ at a co/ ( #e4jj4 ,illu/ration3 ,a #abja ,illu/ration3 ,a #abjb ,a#abjb4 ,comp>ator = ,measur+ ,spectra ,photographs1 ,scales1 ,etc4 ,range #ej cm4 ,! microscope travels on c>efully /raight5$ ways1 & is mov$ by a screw ( #a mm4 pit*4 ,! screw head is fac$ ) a silv] b& & is divid$ 9 #ajjj p>ts4 ,! h&le = turn+ ! screw is plac$ on ! left side ( ! in/rum5t s z to h ! "r h& free = record+ read+s4 ,a set ( *ange ge>s c easily be engag$ to give a fa/ motion to ! c>riage4 ,! /age w hold plates f #c to #h cm4 9 wid? & ( #fj cm4 9 l5g?4 ,x c be %ift$ l5g?wise = a di/ance ( #be cm4 & is provid$ ) adju/m5t = align+ ! plates4 ,! :ole /age c be easily remov$ f ! in/rum5t4 ,! microscope is fitt$ ) v>iable magnify+ p[] & is ( /&>d size4 ,price #dej4jj ,note4--,! design ( ?is comp>ator 0 sugge/$ by ,pr(4 ,humphries1 ,director ,laboratory ( ! ,u4 ,s4 ,wea!r ,bureau1 = :om ! fir/ "o 0 built4 ,illu/ration3 ,a #abjc ,a#abjc4 ,comp>ator = ,/> ,photographs1 measures 9 "o direction #hj mm4 & "u "r angle #fj mm4 ,! l[] "p is con/ruct$ simil> to our ,comp>ator ,a#abja4 ,! top slide c>ries a divid$ circle = measur+ position angles4 ,! circle is arrang$ simil> to a position micromet]4 ,x is fitt$ ) quick ge> motion & tang5t screw & ! two v]ni]s read to #a-ajj degree4 ,! microscope has v>iable magnify+ p[] & is provid$ ) rev]s+ eye piece4 ,?is ma*9e has be5 furni%$ = & is 9 use at ,y]kes1 ,lick & ,kirkwood ,obs]vatories4 ,price #cfe4jj ,illu/ration3 ,a #abjd ,a#abjd4 ,comp>ator4 ,= ,plates #hx#aj in*es4 ,?is ma*9e 0 con/ruct$ 9 accordance ) sugge/ions giv5 by ,dr4 ,frank ,s*les+]1 ,director ( ,allegh5y ,obs]vatory4 ,! ways are c>efully /raight5$ to )9 #j4jjb millimet]4 ,! c>riage is mov$ by two racks & p9ions & has a l>ge h&le on ea* side4 ,two conc5tric circles are fitt$ to ! c>riage1 ! inn] circle c>ries ! plate ) ! film 9 a fix$ plane1 no matt] :at ! ?ickness ( ! glass may be4 ,bo? circles are provid$ ) clamps & tang5t screws1 s t ea* "o may be clamp$ & adju/$ indep5d5tly4 ,! outside circle c>ries f\r index po9ts #ij degrees ap>t4 ,"o ( ^! m>ks is made adju/able4 ,^! f\r m>ks s]ve to turn ! plate exactly #ij degrees s z to measure rectangul> coord9ates4 ,! guide c>ry+ ! measur+ microscope is adju/$ exactly at "r angles to ! ways ( ! b$ plate4 ,! c>riage support+ ! microscope is mov$ by rack & p9ion4 ,! microscope is arrang$ to tilt1 s z to view ei!r ! plate or ! scale above4 ,! eye piece is provid$ ) a rev]s+ prism4 ,measurem5ts are made on ! scale divid$ 9 millimet]s4 ,! small] measurem5ts1 to #a-djjj ( a mm41 are made by ! micromet]4 ,! micromet] is fitt$ ) slid+ eye piece & c\nt] = full revolutions4 ,! scale is n m>k$ 9 ! usual way ) s+le l9es1 b ea* millimet] is m>k$ ) a d\ble l9e4 ,?is d\ble l9e all[s ! use ( "o s+le spid] ?read1 :i* is pref]able to use = bisect+ ! />1 & ! d\ble l9e on ! scale all[s a cle> sett+ ) ! s+le spid] ?read4 ,! /age is fitt$ ) an adaptor = hold+ plates #dx#e in*es4 ,price #dej4jj ,?is ma*9e has be5 9 use dur+ ! la/ ye>s at ! ,y]kes ,obs]vatory & has be5 f\nd v conv5i5t & satisfactory 9 e way4 ,a graduat$ circle c be provid$ if desirable4 ,su* division on solid silv]1 ) v]ni]s read+ to #a-ajj ( a degree w increase ! co/ #ej4jj4 ,a#abje4 ,comp>ator1 = plates #dx#e 94 ( ! same design z ,a#abjd4 ,price #cjj4jj ,illu/ration3 ,a #abjf ,a#abjf4 ,comp>ator4 ,a l>g] ma*9e ( ! same design z ,a#abjd ) scale ( #de cm4 l5g?1 divid$ 9 d\ble l9es to #j4be mm41 & ) two c>riages1 "o = spectrum plates ( #ah 94 l5g? & ! o!r ) divid$ circles = /> photographs #abx#ad4 ,?is in/rum5t 0 con/ruct$ = ! ,sol> ,obs]vatory ( ! ,c>negie ,in/itution at ,m\nt ,wilson1 ,cali=nia4 ,illu/ration3 ,,coelo/at4 ,z built = ! ,unit$ ,/ates ,naval ,obs]vatory aft] design furni%$ by ,mr4 ,w4 ,w4 ,d9widdie4 ,illu/ration3 ,,armill>y ,,sph]e4 ,built aft] design ( ,pr(4 ,j4 ,f4 ,lanneau1 ,wake ,=e/ ,college1 ,n4 ,c4 ,,novemb]1 #aije ,wm4 ,ga]tn] ,co4 ,a/ronomical1 physical & physiological ,app>atus #ecdg-ecdi ,,lake ,,av5ue ,,*icago ,illu/ration ,spectromet]s & ,accessories ,cat4 ,no4 ,l#djbj ,,laboratory ,,spectromet]4 ,?is in/rum5t is v rigid & accurate 9 con/ruction & e "p ( its design has be5 c>efully consid]$4 ,! circle has a diamet] ( #ae cm4 & ! two v]ni]s read to #bj sec4 ,x is fitt$ ) protect+ plate :i* adds greatly to ! value ( ! in/rum5t if put 9 ! h&s ( /ud5ts4 ,! graduation is on solid silv]4 ,! v]ni]s are fitt$ ) adju/able magnify+ glasses1 ! telescopes h an ap]ture ( #be mm41 focal l5g? ( #bjj mm4 ,a horizontal adju/m5t = ! telescope is provid$4 ,no provision is made = radial adju/m5t1 :i* correction is made be=e ! in/rum5t is s5t out4 ,! slit is accurately con/ruct$2 ! jaws are ( ,g]man silv] & x is provid$ ) comp>ison prism4 ,! eye end ( ! obs]v+ telescope is ( /&>d size s z to receive our micromet]s ,m#bja or ,m#bjb1 or ! ,auto ,collimat+ eye piece 7,lamont ,abbe7 ,m#edj4 ,gauze eye piece is fitt$ to ! in/rum5t4 ,! prism table & obs]v+ telescope h indep5d5t movem5ts & ea* is provid$ ) clamp & tang5t screw4 ,! prism table c be clamp$ to any "p ( ! v]ni] plate4 ,! prism hold] has conv5i5t level+ arrangem5t & w hold prism up to #ce mm4 9 height4 ,! in/rum5t is arrang$ to receive ,fuess c5t]+ app>atus & cry/al hold]4 ,a #fj degree heavy fl9t glass prism ( be/ optical quality is includ$4 ,price #ge4jj ,l#djbj;b ,,cam]a ,,atta*m5t w fit 9 place ( ! obs]v+ telescope4 ,x is fitt$ ) long focus objective & /&>d plate hold] #b #a_/bx #b #a_/b4 ,! plate hold] is provid$ ) swivel = prop] focus+ ( ! spectrum4 ,! slit is s arrang$ t f\r exposures c be made on "o plate4 ,price #bj4jj ,cat4 ,no4 ,l#djbj;c ,,scale ,,tube4 ,! ?ird arm ( ! in/rum5t c be easily atta*$ & rotat$ & clamp$ 9 any position4 ,x may also be us$ = hold+ a second ,collimator4 ,price #bj4jj ,cat4 ,no4 ,l#djba ,,/ud5t',s ,,spectromet]4 ,?is in/rum5t is 9 e respect simil> to our ,l#djbj1 b "s ( ! high] f9i% has be5 omitt$4 ,all ! ess5tials are c>efully con/ruct$ & ! optical p>ts are ( ! be/ quality4 ,! circle is protect$ b only "o v]ni] read+ to #cj sec4 is fitt$ to ! in/rum5t4 ,! magnify+ glass is omitt$4 ,price1 includ+ prism #fj4jj ,illu/ration ,illu/ration ,,transcrib]s' ,,notes ,g5]al3 ,corrections to punctuation h n be5 individually not$4 ,g5]al3 ,inconsi/5t spell+ ( catalog_/catalogue pres]v$ z 9 orig9al4 ,page #g3 magnifi+ correct$ to magnify+ & cele/rial correct$ to cele/ial4 ,page #ag3 int5sisy correct$ to int5sity4 ,page #ah3 hundre?s correct$ to hundr$?s4 ,la,platta z 9 orig9al4 ,,nb ,! f9al two pages ( ! book1 on ,a/ronomical1 physical & physiological ,app>atus1 are 9 a slightly diff]5t =mat 9 ! orig9al4 ,p>ticul>ly1 prices are n 9 bold4 ,t has be5 pres]v$ 9 ?is v]sion4