The sun. [volume] (New York [N.Y.]) 1833-1916, 1892-02-14
DIR. n. L. MADDOX.

XIV /Y~V
DR. n. L. MADDOX.
gradients would be changed carefully. only to
havo success. just as it seemed within reach,
slip away. Since vegetable substances failed
him. why not try animal compounds
More complex. they might be moro un-
stable. and therefore moro sensitive to
light. DR.. Maddox mixed white OF egg with
his silver. but In vain. lie next employed the
finest isinglass. and so promising was the
first plate that he felt sure he was on the right
track. Ho was using iodlde Of silver. such as
he had been accustomed to combine with col
lodion. Despite the most careful fllterlng the
isinglass failed to yield sufficiently even sur
face. Then the happy thought struck him:
Why not try geatine1 Fortunately o packet
OF 1t happened to be in tho house. and by dis
solving it he secured a much better surface
than lie had with the isinGlass. Just then he
had been photographlng some laurels. making
a rather poor picture. What could improve this
imperfect plate? He remembered having heard
that for foliage tho bromides were better
suited than the iodides. Tothe bromides. then,
increasing the quantity and lessening that Of
the iodides. he turned. So marked. at that
point. was the success, that he settled on the
use Of bromide alone. Then the first effective
dry plate saw the light Of day. DR.. Maddox at
once published his experiments. To some OF the
most ingenious minds in the ranks Of photog-
raphy. professional and amateur their prom
ise was as certain as dawn. Very soon the
gelRtino-bromide plate. as we now know 1t,
was brought to perfection. In the final i'm
provements Dr. Maddox took no part, as his
health had broken down and he was forbid den
to work. In 1892 a subscription. toward
which American photographers are making
handsome contributions. Is being raised for
him because he is inflrm and poor. Apart
from the subscription. the man whose skill.
fertility OF resource. aud perseverance led the
way to so many triumphs Of science and art
has boel utterly without reward.
Because pictures obtained with collodion
plates are the most delicate and beautiful the
camera can give. repeated attempts have been
naado to increase their constituencies but 80
far without practical success. Tho plate we
owe to Dr. Maddox continues to hold its place
as incomparably the most rapid and con-
venient the photographer can employ. It's
points Of superiority are many. 1t is always
ready for use: it demands no troublesome &C.
cessores: it can be placed in any position: an
impression on. 1t may be obtained by tho touch
OF n spring: after exposure lasting only an In
slant or protracted for hours. the plate may
at any time DO developed at pleasure. Freight
ed with this wealth VI quality. the dry gela-
tine plate takes rank as one OF the great crea-
tive inventions which not only add 70 the cap,
ital Of art and science. but increase the rate ut
which their applications are multiplied.
CATCHING SWIFT MOTIONS.
Let us glance for n moment at some OF the
revelations won through its exquisite sensi-
with the 81 IN OF
estimated at only ono Ave thousandth Of q sec
ond. horses have been photographed walking
birds flying. That and similar work has had
decided effect on pictorial art. Meissonicr and
sentations OF animal motion revised in the
light of the cameras disclosures. In CATCH
ing the. swiltest motion in an instantaneous
ky Of the %iissst sys That
II the eye. moment by moment cannot sep
crate the phases OF motion. It can nevertheless
follow that motion IN It's contnmity Can ph9;
II can; then it may boast not only much power
thrt the eye has not but also every power Yer that
siIisa . !tsSit WITH a., asyise ,lssaFasd
%hs; on fS1 M on sSSdfI
a horse in the 81, successive, motions Of q leap
through narrow vertical Sits in the cylinder.
the apparatus being meantime revolved rap.
ay RS as a hi s d s om stns
Q second image showing the next phase. Of the
leap s ; Hnd - the se
vision. as it Is termed. the impressions blend
into continuity. so That one seems to be look
FL Il the eSry days Of III" saStrope its pictares
were roughly executed wood cuts. When
those wero replaced ty succession Of IN.
wanting; The photographs Wer. taken at too
fuse fuse With precson. That At was the condsion
OF affairs when Mr.. Edison began work on the
tures hs las nvsnted pmachinS Which II ta G
Intervals Of only on,S,iorty.slYth, q second.
tined a mScin "ns When tho strip Sf m"yea
smp ards IKE RRSsSu sh tho m
Of h most e0n
~, is united 70 that OF continuous movement:
through the single ey9ILp.ees all tn; effect Of
tus now being Completed at Mr.' EavlIson's
laboratory series q views from rhis blnrk,
a"rHSea Sap seem r aGe
ny the bar Of red,hot iron; and at
rom e o The s ass
eye VI al tHs setasIlty = HE his frst
Inch square. and found Ms difficulties to be
the stereoptlcon the Images can be enlarged
tonlsflng vividness.
The photograph bestows o distinctly now
and most important git ON mankind mas
Initiating the dcxterity OF mechanic. chemist.
surgeon. or artist its reproductions will be in
valuable. they repeat every movement OF the
hand. not simply as one might observe 1t at
work. but as the eyes would see It were they
deal might. DO learned by watching In
this way how an Australian throws a
boomerang. . Daccan ,wcaves tho it's
sue so delicate as to TO called woven
wind" and how tho artists Of Japan form
and decorate their pottery and bronzes. For
find bound UP IN this new acquisition. let us
note its availability, In teaching tho dumb to
Psa 10 What e