| Show daguerreotype or photographic art the process explained of this tins brt iii ill li re ra are now two tao disI distinct luct bran brandler brandies clies ciles viz ill lix whir li the pictures lre ure re produced upon the metal til ill llin other upon paper or glass lu in the metallic proc process esl iodide ot of silver is i the chom chemical iriti agent agena rather thai than the chloride this is formed by liy submitting a clean plate of 0 poli poll billed silvar sil eil verto to the action ol 01 the vapor of iodine ano and sometimes to liro loro ln onina mitte in ILI order to buic quicken ken keu the artion ant act lili iiii tile tiie plate thu S prepared is placed in ili llie ilia c ceraso that an inage of tile the object to I 1 e coite may illa ilia fall full upon it the llie copse corfe qui quo quence ilce lice Is tint thit in ili lle ile lie ilia lights alights of the pie pis ture lure the tiie iodide of riv r becomes decomposed the lodine iodine itself going or off iii lit the tilt form tonn of acid gaa ga a I 1 by combining with hy dogen in lit the moisture af the air und and thi pure blaer being lett left behind whereas in tiie that thade of tile tiie picture here no li liht ht reaches reach pi tie vie t le iodide of gilper direr remains unde undo compos wl time tire action takes ph ce in ili some bome few according to the intensity of 0 the tile light POLL and nature of be the quick tied when the I 1 ite tte is r moved from the tile camera no picture is visible upon its ita burlice sur lice 10 10 fo 0 that tile the developing part of ill ili tiie tile ts 11 lii lit sa then to be performed this cousis in lit tite tin pida pi ite to tile the fumes of mercury which winch attach themselves to the parts where the tho dure vure silver has bas awn sepi sep separated rated from front the llie iddins with which winch it was wis Com combined biard these parts constitute as wo we slid sald before ilie llie lights of the llie picture and thern thorn tile the in r uri url uri d val vai vapor 0 r is conders ed and clings chugs I 1 ti I 1 ill forai forat of minute globules glo bules whilst to the parts wili will which h irive hive 6 ben en ed ej the tha mercury does not nut attach itself limal hiving no tie affinity whatever whit ever with tiie tile iodide of silver that remains there rile tae consequence is that the glo bules of m r rury iviry walh cling to the portions where th tim tio r ros rus a a have fallen fullen refi ct et so much light to the eye that they tiley forin tile the whites whiles of tile tiie picture whir as then tylo decomposed iodide of silver sending bending no light to the retina cons tle the tie black ail all aud and thus thi i mig wig ilg rig was war latent on oil tile tiie plate is d or r brought out wit nil lisuch hsuch marvelous gid fid lit lity that when u llen lieu examined with a ini ml cro scope characters that were several miles di tant in thor hr shor alual mu may bo b clearly read in lit the ilia minute bunco buneo buti sun co ty y arner after this com ains s ilia dixi ig pro process prncess cess coss and that abat con consists sisti oddly eddly ownly ewd own ly in ili subhi li th ite to 10 tile the action of hap ol 01 K s d to which dissolves di solves Bolie hild mud BO 0 demov anil s nil mil til tio tin timit composed romo d or silver from front it und mild thur rend ra rs it incapable of being further acted upon tipon liv by tinli light lil liu ane tave con atit stif utes wit wint wilt it is now tiow tit mally it til ill y known as the daguerreotype guerreo type percess the pio plo production luction of photographic pictures upon paper oli ui the tila other oilier liand hand lurnis forms what is 0 the process the tho nanos names of tile llie two types being derived from those of their inventors ventora in lu ili the ilia latt laatt r nit nii thod of liro producing ducin g sun pimus there ure are almost clr lit s tilie tille different diff drent stes ste s to le be gone through tl p iper itsu its ii h his is gir fir girt firl t to be or reilda render 1 d I annive munive M to tile tiie action of jagt I 1 gut by means of f c it ling nir nor 7 it willi a it surian of iodide of silver tris is d hlo hii ir by it over first iti ILI a sola soia tiou liun of irl ill nir ra ie ot 01 silver aud and this thid if is dry biti wit a it s lilii li mil mii ot of oi 01 pot siu silum lil lit tile the cons an q nce wn is ili iii tl ow olf solution deco dero the tiie other so lit lil t iii ili rite roe of poti roi rot ici ili uil lil ii aud and iodide 0 silver are ari f nn r n d lii ill it gilr niort it ol 01 potash b ing s auble is it 1 11 w st ot of til ill tiie 1 hiuer met wet bitile ilie lite insolubly edid idid of oi wiver rein rent i 1 is 4 fixed fid gid in ili it then foil loll vvs uis kis s ill lisi aw kid kni k ni ig ol 01 the tile pr cs c s this co cokl coi i is lis its in wat mat lung tiie the ot li ef et nl oil i 4 s it paper wi wt li Is K ot ill wh wll I 1 ii torkied galo gallo nitrate of silver alv ri w iha iwa in n vo i 0 isala 1 of I a sn til ill pronne tion of g gillie tahe hem nem i 1 ie it wid mid from g til ill nut ds solved in lit amr avi ari iti iii i adel i to bolusi it of lumir ca caustic ustle ti i 11 J i I 1 ir n li to act acu or pure iwer ir in if it tn ill uli uil ull i 1 i id A ai ac ilc lic iii w ails abis lils itis tre ire re us d bv cause it 1 I 1 lotina oil oti iid lid 11 1 l t aw lii rest resi ii 11 e of boy ary vecel ilife ible 0 org borgini or gini mic trl i i i r b the lie lle der dec of nitrate it i vi t iv ra biln liu lin n x xo ota ot oto eo a to lilt lil ill t tiie tile paper is now re d ar tor lor lle tie ile rain r ri and is isy isi i si sa sn sni bitin tot tut i 1 cl clion loi tos i liln light it is is I 1 id to tra tri t e eo aim him ii r i v i i d pipi pap r in fit this his 1 I more than thin it hu liin it r J 1 1 I 11 so 0 o ili til i i vt v t n a sean si cm d or two oo 01 thle lu ilme lime iv is I 1 run bun buffi i i lit ut to bip res rss a labeit iman imai upon it then m a in i it th d i it reeo type ni mt elod oi tae llie de ve louing arc ss ass 11 s lo 10 b bi d to ill lii in t to 0 bring out in lit it 1 n I r P win wiil ii it is i on oil removing tie t ie iv p ui ut fro ro it the tha cinieri and the existence of li irli would iol rol tol be by any on ong one a w who lio iko li it I 1 been forewarned by arvi ous etjen 9 T I 1 j rente r thy thi picture virile the pipe is w t i id d ivr once lice tice in ili ire with willi the file gal lo ol 01 twit r before bi fore fure def dee scrib d and ani then warmed godaly gr ally b U fu to tiie tile gire fire taint p of the p iper ill oil on me tile ilg it has acted ll begins gins to darken while ta oth r part pirt of the llie paper retains its whiten s atter alter this tilis as iii lit in the tho da pa in tj tid liguri d llie lite fi fr aig pores p oress ore a has lias to be resorted to T as tr tor consists I 1 in washing tila ilia bpi r I 1 li ii 11 boni Jn ot oi lurn which dissolves out oat all rii lii v i it posed chemicals and ca as leaves an i t assion it rs sion behind tha picture inui pi deduced educed however is what I 1 is termed a negative one i hat is to toay toas say sas i ay tile tho luhs lyhs aig i la in the original are represented by shades in ili the photographic copy and vice versa vers i ili in nature are rendered as lights in tiie tile picture tile therefore there ioree torri has to bo be again copied in order that the ilia lights and shades may nitty be accurately represented for this purpose pur pose poso however llie tile paper need not be lit so highly s usi tive tire so that the ordinary quicken quickening ing part of or the process hy by means of the gallo nitrate may be with millie or the paper may be coated rufth chlor chloreda cl lorida ida lda of sliver hilver ILI iu elead stead of iodide before described again tie tle the developing ve process is no longer necessary nee ilee tile tiie picture being produced directly by the action of lalit roher rather than indirectly by means of some developing agent rile tile file fixing process in lit this bt st ga ge is usually performed by means of hypo aulph ito tto of aoda oda ana and by these means the negative picture be f fore ore 1 produced is rendered positive and the ilg lights gits and shades thus made au lou accurate represent illon ilion of those in kiture it wll wil wl 1 now bo be seen that thai the tile art of 1 p educing euti pictures whether by the thi D or uit hit type comprise com priss prisa s four lour distinct viz I 1 the tile preparatory process proc esc err which consists in lit preparing the tile i we idle or that is lo 10 fray bay in fit coating it itil with fill sonie sonic solution of silver that is ra palle of being di d ly fly the lite action of legill light t 2 the die quickening process winch which again in ili rendering he plate or paper inore lnore baigh ly to light by the tiie addition of some bome other chemi cat edt which facilitate s the decomposition of tiie the compound of silver ilver fc v aith ith which the surface has lias been iwa coated 3 the tin dd tie eloping process which consists in rendering visible tile the ment went picture which has lids been impressed upon the 11 late or paper while exposed to tile action ol 01 the light liht ili in tile tilee camera 4 the fixing filing process proc bs or the dissolving out of all ali he ilia hilver compound and so preventing tile the light from having any further uc lie lion upun upon it it mutt not be supposed that the compounds of silver ure are those only w which aich bre are capable of being decomposed by the suns sunn for photographic pictures ji ive ave been produced by compounds of all the ilia precious ir erious etious s such nn us gold pi pl illium linum mercury mei cury ae dwse onse th s h ving out and aud so being easily eastly separable irom from tite tile elem elements ants with which they fire tire united agin agda iron fruit has been used for the s lino line purpose for this tins body also is readily do decomposed om posed when wilen combined with certain subs bubs s further the duni culm resins aud mid bi aundt of beug be rig rag employed in ili the same battle mauner manner indi iner nd arid diviny legeta tte lie juices have been used by sir julin john herschel for a like purpose indeed it has been truly sid sid that almont a in ob t eiery every in ili caturi 1 is bif bir acted in ILI some way or other by tile tiie t solar olar tolar ra ras raa s for or we e now know that no ito substance call can be exposed to tile the guns suna rays without undergoing chemical action |
