The Camden chronicle. (Camden, Tenn.) 1890-current, 1904-07-01

sible, SIX different views on as many
plates, measuring twenty-one by TWEEN
y-seyen centimeterS eight and one
tenth inches by ten and one half inches)
were first taken. From these six
plates, which were designed with 4
view to being connected to one another
i'll a continuous series. six enlarge
ments, one and one-half by two meters
-four feet eleven inches by six feet
seven inches in size were prepared
by means of an apparatus with a lens
thirtytwo centineters zone FOOT in
diameter. The cnlargements were
made directly on silver bromide paper
The inherent difficulty of connecting
the single plates so as to avoid any
break was overcome so successfully
that it is practically impossible to de
tect the boundary line OF any tW'
plates. According to their character
the six negatives were exposed for III
equal periods, varying between one
half and one and -one-fourth hours.
In order to develop the picture, Il
huge wheel was made of specially pre-
pared wood The wheel was four
meters thirteen and twelve one-hun-
iredths feeD in diameter and one and
three-fourthS meters Give and one-half
feet) in breadth, the periphery thus be-
Ing twelve and one-half meters (forty
one feet. and containing ninety Stats
intended for receiving the Photographic
paper. There were further used three
large taAks about seventy and one-half
cubic feet in capacity, intended respec
lively for the developing. clearing and
fixing solutions acetic acid and sodium
hydroxide solutions. Each tank could
be shifted about on five iron wheels
moving along rails sixteen meters
{fifty-two and forty eight hun
dredths feet in length. A gigantic
water tank. fifteen meters forty-
and one-ffth feet in length, two meters
(six and fifty-siX One-hundredths feeU
in breadth, and three-fourths meter
two and forty-six -hundredths feet
In height, having a total capacity as
high US 476.68 cubic feet, was further
used.
On account of the large developing
wheel used, the paper was developed
by night in the open air. Before de-
veloping the picture the exposed paper,
fitted with protecting cover, was
laid over the Stats of til" wheel. The
wheel was then set rotating. AS 1t
turned, it dipped the lower part Of the
paper into the developing liquid. The
light portions were especially treated
with sponges impregnated with ener-
getic developers. Portions whose de-
yelopment was too rapid were checked
by means of iced acetic acid solutions.
An iron Oxalatc developer was used.
After first nterrupting the develop
ing process by projecting iced acetic
acid on the photograph by means OF a
hand pump, the paper was conveyed
into an acetic acid bath. where the
clearing process was completed after
twenty minutes time. The picture.
after, an intense rinSing. was trans
ferred into the fixing bath. where 1t re-
NAMED three-Quarters of an hour.
After another rinsing the photograph
was thence conveyed into the large
washing tank above mentioned. where
IL remained for about eight hours,
while continuous supply and with
drawal of water took place. The total
consumption Of water used i'll washing
the print was about 10,593 cubic feet
After the water was drawn off, the
picture was stretched out on wooden
bars attached to the upper edge of the
tank. where it remained for about ten
hours before it was completely dried
Berlin Correspondent of the Scientific
American,