, 1874-08-21

waa aaturatipts them with puro white Wax, which
greatly Increased thofr transparency, without
i5mRalllng Their nharnnesB. MANY Of tho
iaonca.e ias1 IT, sl!aa'nRH, H1teh waro formerly
'sss ss eas, s ssnsfs ID ths ahs papPs
& iho negative, alao, waa rendered ionthery, and
tough and lesa abie to bo tiirtiod or injurdd...
Still however, It was felt That q mnol moro
Fer % wan required to tmproBs tho oxqnisitoly
.ho1utttlt pictures pafntpd by tho ponoiis ot
light, ORC tho tnlcl-tiosirod perfection could DO
obta'nnd. Many long. conference the senera-
hie phi'onopher,, Lord h,nnntrd, mud tho wrtes
Aad On the atluloctt a11l many q substance was
e1perimentca With. After tho long interval, It
Is curious TO sesnonhor that The gins!nous slime
oxuded BY s''ai!s was tried. btt alas II waB
great drawback fsshicl, most substaacoa we tried
| haa)-it was too easily soluble Ia water. The
J film Of IT, which "aa saroad on tho glass; would
| not oadaro tho inahlpnfel,on aid frequent
w9sh'nga necessary to complete the picture.
| film, which would absorb wator, and yot not be
soluble ~ It. at lust somo ono twhose naa,e NO
fcrxot} hit uroa the happy idos Of employing
tho white Of an egg; Thls substance is noarly
perfectly Holubo In wator, but, when IL has been
exposed 10 temperature approaching TINT Of
boiling wafer, It becomes !nsolnblc. It had,
therefore, tho requisites sought.
On tho discovery being made known to Sir
ato,,a with the nov medium wore eagerly conf
naouced. Lord Hinhaird 4ad provided limsotr
with largo forr-inch obieet-lens camora, by
noao, OF London the weather waa beautiful,
egga abundant, aud VIC woro sooi All engroeHcd
IL our experiments.
Tho moduB opernudi waH simply this: Tho
whites OF dozon cggB were tlrned into largo
tasn. an equal bulk OF rain-water Has added,
TOW grains ot iodido Of potassium wore flung IN,
aud tho whole waa whiBked up into 4 whita froth
like snow. The basin and its contoutg uele set
aside In plocs troa from dust, and in a few
hours BEAUTIFUL Transparent fluid, tho color Of
p1la shorty, waa found at tho bottom. It was
deGauted INTO wldo-1nouthed stoppaEod bottle,
and ,sag immediately fit for uto. lltfs was tho
now materIil; for which tho inventor dosaryca
immortality. It hag not yot boen surpassed, md
must ba reaorted to when pictureB OF ordinary
felicacy aro required Ihe matoraa daying beeu
tiias prepared, b hheet of glass, the stze Of tho
intended picture. was mado perfectly cloan the a1
bnmon wasp0ured over its surface, and drained on
at Que cotuor and the glaes, with tue still wet film
upon 1t, was thou held vertically boforo a clear
coagutated and rendered insoiuble. Tho shoot
Of glasa when cool waB dipped into atroug
solution Of nitrate Of Siyer fot two or shrao
minutes, by which means 1t became sonBitizcd.
It waa thou put III dark slide, and carried to
tho catnera. After being exposed to the light 1t
WAS developed by q mixed soln!lon Of acoto-
uitrato Of sitTef and gaiiio acids
By this method pictures far surprising tho
talbotYpo process wore produced; indoodf thoy
loft alost nothing to bo desired except rapidity-
Aluozt immediately aftor tho discovery Of tic
Albumnn process, tho application Of collodion
was suggcssca, and It waa found to givo such
beautiful results. to DO 30 friendly ip ies work.
ings, and 80 high Iu its sonsisveness that 1T haH
taken precedence OF ail other mstaada. Ia tho
OrJnauco Office, however, alhumen from tho
Clear sharp "details it gives IL still employed for
tho enlargement or reduction Of tito ordnance
mapa, etc.
tively etgaged ia .ertecting Lila invention OF tho
reffacsing EsorcoRcopc, QUO Of tho m06t beatltf-
fnl Instruments of modern times, which, by it's
wonderful ctentions. hns conferred pure and rc-
lnillg pleasure upon millions. As It waa Of tho
highest importance tor displaying tho powers Of
ths instrument that tho pictures to be united
should bo perfect representations OF tho samo
scono or Object from alfGhsly different points
OF view, SIR David eatly saw tho value Of PHO
prosecuted 1t, we'll knowing that it would give
Tho exquisite drawing, and chiar-oscuro, indis-
potsaolo to that perfection Which hiB mind Baw
to bo attainaDle. It was amid tho laborB snd
Researches at Rosso that 10 hxcd upon tho form
matte ouscs, tho sizo Of its pictures, and many
other detailH in regard to it, which have now long
characterized tho instrument. However simnlo
theeo nay appear to tho storooacopist. they were
NIL tho result Of patient Thought and lsugtheaed
experiment. Tho first Bterooseopo with Which la
Experimental waR ciumBy, ili-maaB thing,
somewhat like domonted opera-glasB, which
Bomo nnllsndy tnBlnith in st. Andrews bad
matie for h,,n. Misshapen and unsigAtly enough
it was, it served le purpose. and led ultimately
to the elegant and effoctiyb instrument with
which every QUO is 40 familiar. Ihe .lrst stereo-
scopio photographs wore taken for tho St. An
drows tins,nith's affair. Which. wretched though
it Sas, served to show what glorious reprodac-
tions Of all that is beautiful and grand Ia nature
and art wero about to rise, through tho Eoniua
Of tho grand old man; md as tho reward Of bis
interesting labors.
1t was = striking illustration Of Sir David's
wonderful phyRicnl viGor, as vol IS OF tho vcr.
eatity of his mud. thnt ho could work duriuS
tue greater part Of tho daylight in taking pit.
tlres. aud then could, after dinner, rntro to LIS
room. md write for hours, CARRYING Oh his con-
trovorny with WhoatHtone. and keeping himselt
up with all that was goiug on in the 11lentito
world. lilo mrlst often havo rat till far in tho
morning preparing hia papers for the different
Journals to which hs contributed, aud carving
laid tho foundation in oysn i,ia woll-stsung and
wiry frame OF the neuralgia from Which he suf~
forod 20 soveroly In his latto1 days. But at tho
tine OF which wd write ho was eEor tho first
ready for operations, always having some new
phuBo OF the work to Rnggest.
When tho htoreoscop3 Lad, By his improve
ments, bccomo worry much Hhnt il now ill., tho as-
bumen process fur.aished exquisite Pictures for
tue dihp'ny of its powers. It oronea up, Us it
Bcenea In which al TINT is grand and boautful ia
combined, aud which they could noyor hopo to
visit. At very oarly stago in the history Of the
sterooseopo, some French artista 8ent Sir David
some most beautiful slidoa, containing y4owa in
8witzaraud, witch, through Ais published COM
mut,icatouB, they had managed to produce. Ho
wuB highly Frnt1ticd BY their reception, and ex-
libllod them with 10 little pride.
1t is not our purpose to follow tho history Of
photography further. At this poiut itH oonuoc~
lion with Sir David to great extent ceased. 1t
was takon up by 1apidly- y-inereasing mutitudo Of
professional ,tHts, who established themselves
IN all parts Ut tue country. b1any Of tlon. have
risen to onnonco, a,d produced worils OF grcat
beauty. Since tho introduction Of colEodion, the
art hns had, in different countiies, able expoAt-
ors, and wel-cond,cted Journals, specially Do
voted to its advancement.
It ia pleasing to look back. md to think OF the
wonderful progress which has been mado since
the first attempts, above described were UNDER
taken, but It ii melancholy to think how the ouco
joyous mud happy party which used to assemble
ut Rosslo priory has heon brokou up BIZ the raw
ages Of death. Tho solons OF that noble house
aro in the grave, and the grand and good old
man, who acd hight md Joy over all ouf atnr,so-
nonta, has followed theBo bright onos to a bet
ter world.