,libr>ies47 ,blackbo>d ,draw+ ,a ,,monograph ,,by ,,fr$]ick ,,:itney ,,( ,,! ,,/ate ,,normal ,,s*ool ,,salem1 ,,massa*usetts ,,six? ,,edition ,,publi%$ ,,by ,atk9son1 ,m5tz] ,company ,bo/on ,new ,york ,*icago ,atlanta ,dallas ,copyright1 #aijb-aijc1 by ,! ,davis ,press ,all ,rights ,res]v$ ,=eword ,?is monograph is a repr9t ( a s]ies ( articles fir/ publi%$ 9 ! second volume ( ! magaz9e n[ kn[n z ,! ,s*ool ,arts ,book4 ,! articles attract$ wide att5tion on acc\nt ( _! timel9ess & _! illu/rations4 ,! plates 7 made f photographs ( actual "w ^u ! blackbo>d by ,mr4 ,:itney1 & are und\bt$ly ! mo/ attractive blackbo>d draw+s ev] publi%$4 ,! dem& = ^! articles has be5 s great t ! orig9al editions h be5 exhau/$4 ,!y are republi%$ 9 ?is =m 9 ! hope t !y may influ5ce yet m /rongly ! increas+ numb] ( tea*]s :o f9d ! blackbo>d indisp5sable 9 tea*+4 ,,h5ry ,,turn] ,,bailey ,septemb]1 #aijc ,,blackbo>d ,,draw+ ,none ( ! tea*]s :o read ,! ,s*ool ,arts ,book f mon? to mon? d\bt 9 ! lea/ ! value ( draw+ 9 our s*ools1 & !re is no ne$ ( ! slighte/ argum5t 9 its favor4 ,ev5 9 ! l[e/ grades ! tea*] appreciates draw+ z ! natural expression ( ! ?\ght & exp]i5ce ( ! *ild2 a spontane\s activity1 hav+ its relation to life1 n a ?+ ap>t f life or an end 9 itself4 ,?r\gh\t ! grades ! tea*] %\ld cultivate ?is _s ( fre$om & int]e/1 rememb]+ t draw+ is a language to be us$ z naturally & freely z "o writt5 or spok54 ,:y %\ld ^! sugge/ions n apply to ! tea*] z well z to ! *ild8 ,:y %\ld %e n express h]self1 ! int]e/s ( s*ool life & ( ! pupil 9 ! same free1 natural way8 ,^u ent]+ a s*oolroom ! tea*] f9ds ! blackbo>ds b>e & dull4 ,!re is little 9 ! l9e ( decoration 9 ! room & 9 ord] to relieve ?is monotony %e /5cils a bord]1 ! picture ( "s great h]o or well-kn[n au?or1 draws ) color$ *alk ! inevitable flags cross$ at "r angles or puts ^u ! bo>d "s design :i* possibly may or p]haps may n h relation to ! ne$s ( ! *ildr51 _! life & activities1 or ! indu/ries ( ! s*ool4 ,:5 ! draw+ on ! "p ( ! *ild becomes ! natural & free expression ( ! activities & int]e/s ( e-day life1 & ! tea*] uses ?is graphic language 9 ! same mann]1 ! blackbo>ds w be f\nd con/antly 9 use & ^u !m an ev] *ang+ s]ies ( draw+s4 ,^! draw+s %\ld be illu/rations ( ! geography1 hi/ory1 lit]ature1 nature "w or any o!r l9e dem&+ _! aid4 ,let !m be draw+s ^u :i* a few mom5ts ( "t are sp5t1 a free sket* illu/rat+ ! object or topic z a means ( mak+ ! subject cle>] 9 ! m9ds ( ! pupils1 n a picture produc$ by ! labor$ use ( *alk & eras]1 to be kept ^u ! bo>d indef9itely z a bit ( decoration4 ,illu/ration3 ,plate #a ,illu/ration3 ,plate #b ,let me sugge/ ! practice ( ! foll[+ /rokes & lat] we w try _! application 9 v>i\s draw+s recomm5d$ by tea*]s f sev]al s*ools4 ,9 ^! illu/rations use ab\t two-?irds ( a /ick ( s(t blackbo>d crayon1 us+ ! l>ge end & draw+ ) ! side ( ! *alk4 ,?is use ( ! crayon w produce any tone f :ite to neutral gray4 ,no4 #a4 ,place ! *alk 9 a horizontal position & try a smoo? ev5 /roke "o or two feet 9 l5g?4 ,illu/ration3 ,plate #c ,no4 #b4 ,a simil> /roke 9 a grad$ scale lett+ ! pressure become less & less t[>d ! l[] end ( ! /roke4 ,no4 #c4 ,rev]se ,no4 #b h>dly t\*+ ! bo>d at fir/ & increas+ ! pressure t[>d ! l[] end4 ,if *>coal is us$ = ! l[] tones1 a v satisfactory scale may be produc$ z 9 ! la/ illu/ration on ,plate #a4 ,no4 #d4 ,comb9e ,no4 #b & ,no4 #c 9 a s+le /roke4 ,try all ^! /rokes aga9 & aga9 9 a v]tical1 horizontal1 oblique1 & curv+ direction until ea* c be made 9 a second or two4 ,illu/ration3 ,plate #d ,no4 #e4 ,place ! *alk 9 a v]tical position ^u ! bo>d1 draw d[nw>d1 gradually twi/+ ! *alk to a horizontal position4 ,no4 #f4 ,place ! *alk horizontally & draw d[nw>d1 twi/+ ! *alk to a v]tical position4 ,no4 #g4 ,^! spots are ,no4 #e & ,no4 #f comb9$4 ,try !m ) a %ort1 quick motion ( ! *alk4 ,no4 #h4 ,comb9e two spots simil> to ! fir/ at ,no4 #g4 ,! leaf 9 outl9e requires sev]al l9es :ile ! draw+ repres5t+ ! surface 0 made ) two /rokes & "o l9e = ! midrib & /em4 ,try sev]al leaves ( diff]5t %apes us+ ! /roke sugge/$ on ?is plate4 ,! pond lily is drawn ) ?is same /roke r$uc$4 ,no4 #i4 ,make a scale f left to "r by pressure ^u "o end ( ! *alk1 :ile giv+ a v]tical /roke4 ,try ?is 9 v>i\s directions4 ,use two p>allel /rokes & ) a bit ( *>coal = acc5t try ! trunk ( ! bir* tree4 ,no4 #aj4 ,use ,no4 #d1 ,plate #a1 9 a s]ies ( lights & d>ks4 ,?is is made by quick pressure at %ort int]vals )\t remov+ ! *alk f ! bo>d4 ,i h se5 ?is us$ by sci5ce tea*]s to illu/rate vibrations or wave l5g?s2 we %all use x lat] = pictorial purposes4 ,no4 #aa4 ,place ! *alk ^u ! bo>d 9 a horizontal position1 move rapidly back & =?1 gradually %ort5+ ! /roke1 & repeat ?is ex]cise 9 v>i\s positions & directions4 ,no4 #ab4 ,?is draw+ 0 made by ! use ( ,no4 #aa4 ,draw fir/ a few l9es sugge/+ ! gr[? ( ! f]n1 !n add ! /rokes lett+ ! f]n dictate ! direction1 acc5t+ ! light] values by a /rong] pressure4 ,draw ! upp] leaf on ,plate #d by ! use ( /roke ,no4 #f1 h>dly t\*+ ! bo>d = ! gray tones1 !n add+ ! :ite tones ) a /rong] pressure ^u ! *alk4 ,are we sure t we h n tri$ to make draw+ an end r ?an a means8 ,let u rememb] t !re mu/ be a motive prompt+ ! "w1 an int]e/ or exp]i5ce back ( ! draw+ :i* dem&s expression4 ,9 ! color "w1 design1 & manual "w1 ! influ5ce ( ?is ?\ght has already be5 felt4 ,! object ne$$ 9 ! s*oolroom or = ! individual use ( ! pupil is ! object design$ & made4 ,) ?is new motive1 !re comes a gr[+ appreciation & int]e/ on ! "p ( ! *ild4 ,! blackbo>d draw+ %\ld be gov]n$ by ! same _s1 ! ne$ ( ! h\r1 j z surely z ! *ild's "w at 8 desk1 & :5 ! tea*] realizes ?is fact1 he w nev] lack a subject = illu/ration4 ,= in/ance1 9 ! fall ! class may be /udy+ trees1 & draw+ w be f\nd indisp5sable4 ,! *ildr5 are /udy+ "s tree ne> at h&1 comp>+ trees to discov] _! po9ts ( lik5ess & diff]5ce1 collect+ pictures ( trees & m\nt+ ^! to illu/rate _! description1 & ) ?is /udy !y are becom+ m or less famili> ) our common trees4 ,if ! tea*] %\ld g to ! blackbo>d to en=ce a po9t 9 reg>d to ! g5]al =m ( ! tree1 direction ( bran*es or *>act]i/ic details1 he w f9d su* sket*es a great help4 ,x is ! tea*] :o does su* illu/rative draw+ :o holds & int]e/s 8 class4 ,let u try a few simple applications ( ! practice previ\sly sugge/$1 us+ ! trees z our topic = illu/ration4 ,no4 #ac4 ,draw a gray1 v]tical l9e sugge/+ ! *>act]i/ic l9e ( gr[? 9 ! p9e tree4 ,use ! /roke giv5 9 ,no4 #aa = ! foliage4 ,to repres5t ! foliage 9 a mass1 simply %ort5 or l5g!n ! /roke ( ! *alk1 us+ a great] pressure "h & !re4 ,) ! side ( ! *alk repres5t ! trunk ( ! tree :]e visible & ) ! po9t indicate bran*es4 ,illu/ration3 ,plate #e ,c]ta9 laws gov]n blackbo>d "w z well z object draw+ on pap]4 ,a sket* ( ! object z a :ole mu/ be made fir/ & ! mass+ ( ! lights & %ades mu/ be done be=e detail is attempt$4 ,! g5]al outl9e may (t5 be sket*$ ) *>coal & correct$ :5 ! *alk is us$4 ,illu/ration3 ,plate #f ,no4 #ad4 ,try ! popl> tree4 ,aga9 ! v]tical l9e is *>act]i/ic4 ,indicate ?is4 ,mass ! foliage z be=e1 us+ a v]tical r ?an a horizontal /roke4 ,d n remove ! *alk f ! bo>d until ! mass ( foliage is repres5t$ & rememb] to give a light pressure = ! grays & a /rong "o = ! :ites4 ,x is n ! greate/ quantity ( *alk :i* gives ! be/ draw+ any m ?an ! greate/ quantity ( pigm5t 9 our color "w :i* gives ! be/ pa9t+4 ,repres5t trunk & bran*es z 9 ,no4 #ac4 ,illu/ration3 ,plate #g ,no4 #ae4 ,a bit ( l&scape indicat$ by a few /rokes ( *alk (t5 r5d]s ! draw+ mu* m pleas+ & at ! same "t sugge/s ! environm5t ( ! tree4 ,! l9es us$ "h are ^? giv5 9 ,no4 #a1 ,no4 #i & ,no4 #aa1 & are easily repres5t$4 ,illu/ration3 ,plate #h ,no4 #af4 ,! will[ is ano!r int]e/+ tree = /udy & is drawn 9 a simil> mann] to ^? previ\sly m5tion$4 ,! /roke ( ! *alk = foliage is a curv+ "o r ?an horizontal z 9 ! ev]gre5 or v]tical z 9 ! popl>4 ,no4 #ag4 ,a sugge/ion ( di/ance w frequ5tly be f\nd a good backgr\nd = a tree1 build+ or o!r simil> =egr\nd4 ,! di/ance is treat$ 9 exactly ! same mann] z ! foliage 9 _m ( ! trees1 ! side ( ! *alk giv+ a gray1 unev5 surface4 ,9 draw+ ! wat] repres5t ! reflections ) v]tical /rokes & ! ripples ) horizontal ones4 ,illu/ration3 ,plate #i ,no4 #ah4 ,make ! hillside ) two or ?ree gray /rokes ( ,no4 #a1 ! cl\ds ) a simil> curv+ /roke1 & ! trees ) *>coal1 us+ ! same treatm5t z 9 ! *alk draw+s4 ,illu/ration3 ,plate #aj ,no4 #ai4 ,exp]im5t ) a few vegetables1 or fruit1 us+ ! /rokes :i* ! illu/rations w readily sugge/4 ,= ! grapes use a %ort piece ( *alk & a quick1 curv+ /roke1 ! po9t be+ us$ only 9 acc5t+4 ,no4 #bj4 ,! basket is repres5t$ by us+ ,no4 #aj1 ,plate #c1 = ! surface & ! po9t = ! details4 ,exp]im5t a :ile ) ! h&le1 beg9 at ! l[] end at ! left1 draw upw>d1 to ! "r & d[nw>d4 ,illu/ration3 ,plate #aa ,! tumbl] is repres5t$ by us+ a few gray v]tical /rokes ( ! *alk4 ,acc5t ) *alk = high lights & a bit ( *>coal = d>ks4 ,9 ! o!r objects on ,plate #h let ! surface ( ! vegetable dictate ! direction ( ! /roke1 keep+ ! "w z simple z possible4 ,see ) h[ few t\*es an effect c be obta9$4 ,a v>iety ( illu/rations may be attempt$1 all ( :i* h be5 sugge/$ by grade tea*]s z useful 9 _m l9es ( s*ool "w4 ,illu/ration3 ,plate #ab ,illu/ration3 ,plate #ac ,an outl9e draw+ ^u ! blackbo>d expresses mu*1 & is (t5 bett] ?an any attempt at light & %ade or v>iety 9 tone1 yet !re are frequ5t occasions :5 ! repres5tation ( solidity or ( surface is bett] obta9$ 9 illu/rative "w by ! use ( ! side ( ! *alk & *>coal4 ,9 su* cases leave ! blackbo>d = ! middle values & use ! *>coal & *alk z 9 previ\s sket*es4 ,= in/ance1 make a draw+ ( ! wigwam & canoe1 add+ "s ( ! tree sket*es ^u :i* we h previ\sly work$ or simply indicat+ a few tree trunks4 ,illu/ration3 ,plate #ad ,no4 #ba4 ,make a light sket* ei!r ) *alk or *>coal1 indicat+ ! g5]al =m ( ! objects1 or if "o has a good idea ( =m1 he may make ! draw+ )\t outl9+4 ,a few oblique /rokes h&l$ 9 ! same mann] z ! gray tones giv5 9 ,no4 #a w produce ! wigwam4 ,! details may be add$ ) *alk or *>coal4 ,a s+le horizontal /roke curv+ a bit at ei!r end gives ! g5]al =m ( ! canoe4 ,if a few m9or m>k+s are giv51 ! *ildr5 w h no d\bt ( y\r int5t 9 ! sket*4 ,= ! tree trunks use ! /roke sugge/$ by ,no4 #i1 & = ! wat] consult ,no4 #ag & ,no4 #ah1 ,plate #g4 ,no4 #bb4 ,! woodl& appeals to all *ildr5 & is frequ5tly ! topic 9 hi/ory1 geography1 botany1 lit]ature1 & nature /udy z well z draw+4 ,a few broad1 gray /rokes w give ! sky4 ,) a clo?1 erase tree tops = ! di/ance & a few v]tical l9es = tree trunks4 ,use ! v]tical /rokes sugge/$ 9 ,no4 #i = ! light tones 9 ! trees & *>coal = ! d>ks to produce ! cyl9drical effect4 ,mass ! foliage z 9 ! trees previ\sly drawn & add ! necess>y m>k+s = bran*es4 ,no4 #bc4 ,a l&scape ) ! old h\se 9 ! =egr\nd gives an opportunity to put into practice _m ( ! previ\s sugge/ions4 ,no4 #bd4 ,?is sket* 0 ask$ = z an illu/ration = ! /udy ( colonial hi/ory4 ,9 bo? ,no4 #bc & ,no4 #bd ! sky is drawn by ! use ( ! horizontal /roke & ! cl\ds1 trees1 & di/ance eras$ ) a bit ( s(t clo?4 ,! /rokes us$ 9 ! build+s & f5ce are evid5t & ne$ no int]pretation4 ,plate ,no4 #ab %[s two looms made by ! *ildr51 & ! beg9n+ ( ! rugs !y are weav+ f _! own designs4 ,! illu/ration is f ! blackbo>d draw+ made by ! tea*] to %[ h[ ! ,indians made & us$ a loom4 ,?is illu/ration has be5 us$ 9 hi/ory1 geography1 & manual tra9+4 ,lessons 9 geography (t5 require quick illu/ration4 ,! s*ool build+ may n be well locat$ = ?is /udy1 or ! tea*] is n =tunate en\gh to h a good s]ies ( pictures = ! use ( 8 class4 ,9 su* cases1 or 9 any case1 ev5 :5 he has o!r mat]ial1 blackbo>d illu/ration w help ! *ildr54 ,no4 #be1 ,no4 #bf1 & ,no4 #bg1 ,plate #ac1 sugge/s useful sket*es4 ,su* topics z ! cl\ds1 ! m\nta9s1 ! pla91 ! valley1 ! brook1 ! wat]fall1 ! bea*1 ! ocean1 ! cliff1 & innum]able o!rs are easily & quickly illu/rat$ 9 ?is mann]4 ,! tea*] :o 9 a few mom5ts c take advantage ( ?is graphic language f9ds ! lessons a delight to himself & to ! class4 ,animal draw+ is an extremely int]e/+ lesson = ! *ildr51 at ! same "t a r difficult "o = _m tea*]s4 ,on ,plate #ad w be f\nd a few draw+s sugge/+ h[ few l9es w indicate ! g5]al outl9e & h[ few /rokes ( ! side ( ! *alk w sugge/ ! surface4 ,!re are special days1 seasons1 or occasions :5 blackbo>d draw+s may be us$ to advantage = illu/ration4 ,?anksgiv+ /ories are anticipat$ by ! *ildr51 & ,?anksgiv+ pictures z well4 ,^! old1 old sc5es1 ev] new1 appeal to u all :e!r pupils or tea*]s4 ,!re are ! settlem5t ( ,new ,engl&1 ! fir/ ,?anksgiv+1 ! h>ve/ "t1 ! family ga!r+1 & num]\s ev5ts :i* sugge/ illu/ration4 ,9 _m s*ools !re is ! delightful cu/om ( rememb]+ "s un=tunate family4 ,! *ildr5 br+ to ! s*ool gifts ( clo?+1 groc]ies1 vegetables1 etc41 & assi/ ! tea*] 9 pack+ ^! good ?+s1 & great is _! joy 9 giv+4 ,illu/ration3 ,plate #ae ,plate #ae4 ,?is draw+ w answ] z an illu/ration ( h>ve/ "t1 or p]haps ! gift itself to be pack$ & s5t away4 ,our lesson 9 object draw+ may be f ^! or simil> objects4 ,9 ?is sket* a few v]tical /rokes give ! backgr\nd & box1 simil> curv+ /rokes ! b>rel1 & horizontal /rokes ! floor4 ,! vegetables are drawn by us+ ! sugge/ions f\nd 9 ,no4 #i1 ,plate #c4 ,! k]nels ( corn are repres5t$ by ! use ( a v small piece ( *alk & /roke ,no4 #aj1 & ! husks by us+ ,no4 #e1 ,no4 #f1 & ,no4 #g1 ,plate #b4 ,! details are add$ ) ! po9t ( ! *alk1 & *>coal is us$ 9 ! %ad[s4 ,illu/ration3 ,plate #af ,*ri/mas "t ( all seasons 9 ! ye> is ! "o ! *ildr5 mo/ love1 & !re are innum]able /ories & ,*ri/mas lessons = ! little ones4 ,let me give y a few v]ses ,i he>d 9 ! fir/ grade & ! illu/ration us$4 ,*ri/mas-day 0 com+1 ,*ri/mas-eve drew ne>2 ,fir-trees !y 7 talk+ l[1 at midnight cold & cle>1 ,& ?is is :at ! fir-tree said1 all 9 ! pale moonlight1 ,n[ :i* ( u %all *os5 be to grace ! ',holy ,night'8 ,! tall trees & ! goodly trees rais$ ea* a l(ty head1 ,9 glad & secret confid5ce1 ?o' n a ^w !y said1 ,b "o1 ! baby ( ! b&1 c\ld n re/ra9 a sigh3 ,y all w be approv$1 said he1 b oh1 :at *ance h ,i8 ,i am s small1 s v small1 no "o w m>k or "k ,h[ ?ick & gre5 my ne$les are1 h[ true my bran*es gr[2 ,few toys or c&les c\ld ,i hold1 b he>t & w are free1 ,& 9 my he>t ( he>ts ,i "k ,i am a ,*ri/mas-tree4 ,! *ildr5 told ( ! woodman :o took 8 axe & />t$ 9 se>* ( a tree = 8 baby at home2 ( ! delight ( ! little tree at be+ *os51 & ( ! joy ( ! little daught] :5 %e saw x array$ & hold+ h] ,*ri/mas gifts4 ,! accompany+ draw+ w s]ve z an illu/ration = ?is /ory or z a sket* ( ! =e/ 9 w9t]4 ,plate #af4 ,9 ?is sket* use ! /rokes sugge/$ = illu/rations ,no4 #ac1 ,plate #e1 & ,no4 #bb1 ,plate #aj4 ,use ! side ( ! *alk1 h>dly t\*+ ! bo>d & keep+ ! draw+ v gray4 ,acc5t ) a /rong pressure ! p>ts repres5t+ sn[4 ,?is is b "o sugge/ion4 ,!re is ! inevitable ,*ri/mas tree ) ! toys & gifts1 ,santa ,claus be>+ 8 bundle ( gifts or go+ d[n ! *imney1 & ! fireplace ) ! /ock+s1 all ( :i* are quickly drawn 9 ! mann] giv5 9 previ\s sket*es4 ,wa%+ton's bir?day br+s to m9d ! /ories ( 8 life1 & pictures may be f\nd illu/rat+ ^! incid5ts4 ,"o or two :i* all may see & discuss w prove valuable4 ,plate #ag w %[ a few draw+s :i* h be5 us$ to advantage4 ,a4 ,ne> ,wa%+ton's ,bir?place4 ,b4 ,mt4 ,v]non4 ,c4 ,an old ,/age ,coa*4 ,9 ^! sket*es ! /rokes us$ are evid5t4 ,aga91 ,patriots' ,day & ,memorial ,day pres5t _m ideas 9 reg>d to blackbo>d draw+ & decoration4 ,"s ( ^! illu/rations are deplorable4 ,i well rememb] "o s*oolroom :i* ,i visit$ & ! draw+s :i* 7 ^u ! bo>ds4 ,on "o side 0 a sket* ( a pyramid ( cannon balls1 next1 sev]al guns /ack$1 !n two swords cross$ at "r angles4 ,on ano!r side 0 a cannon1 a wrea? ( "s sort ar\nd ! /5cil$ portrait ( a dead h]o1 a tomb/one ) an inscription1 & s on ab\t ! room1 ev]y?+ sugge/+ w>1 mis]y1 blood%$1 & dea?4 ,c we n f9d some?+ o!r ?an su* illu/rations1 & br+ to ! ?\ght ( ! *ildr5 love ( home & c\ntry1 & a rev]5ce = ^? :o gave _! lives = _! protection8 ,illu/ration3 ,plate #ag ,i h se5 ,plate #ah us$ 9 a s*oolroom & feel sure x p]=m$ its mission4 ,illu/ration3 ,plate #ah ,plate #ai w p]haps sugge/ its use4 ,9 ^! draw+s ! bo>d is slightly cov]$ ) ei!r *alk or *>coal4 ,9 ,a ab\t t5 /rokes ( ! *alk & ! *>coal outl9e f9i% ! draw+ ( ! lant]n4 ,b is done almo/ entirely ) *>coal1 ! *alk be+ us$ only 9 a few gray tones & ! t\*es ( light 9 ! di/ance4 ,c is produc$ by us+ ! *alk 9 horizontal /rokes & wip+ out ! trees ) a clo?4 ,a few t\*es ( *>coal w give ! foliage1 & ! bridge is add$ ) simple /rokes ) ! side ( ! *alk4 ,illu/ration3 ,plate #ai ,illu/ration3 ,plate #bj ,plate #bj4 ,?is 0 tak5 f a ,k9d]g>t5 room 9 :i* ! *ildr5 7 celebrat+ ,froebel's bir?day4 ,! draw+s ^u ?is plate 7 made by ! use ( ! simple /rokes giv5 or sugge/$ 9 ! plates %[n 9 ! fir/ "p ( ?is article4 ,!re are o!r days ( local int]e/ :i* are celebrat$ 9 v>i\s localities & ! grade tea*] w f9d t ! use ( illu/rations w appeal to ! *ildr51 hold _! int]e/ & impress ^u !m a c5tral ?\ght 9 ! lesson4 ,:e!r tea*+ draw+ or "s o!r /udy 9 ! curriculum1 ! tea*] aims to make 8 "w effective1 & if he %\ld once try blackbo>d illu/ration1 he w f9d x an invaluable aid t[>ds mak+ cle> or emphasiz+ important po9ts4 ,illu/ration