The Olneyville times. (Olneyville [Providence, R.I.]) 1887-1917, 1904-05-27

siDle, six different views on as many
plates, measuring twenty-one by twen-
ty-seyen centimeters eight and one
tenth inches by ten and one half inches)
were first taken. From these six
plates, which were designed with
view 10 being connected to one another
In n continuous series, six enlarge
ments, one and one-balf by two meters
four feet eleven inches by six feet
seven inches) in size were prepared
by means of an apparatus with a lens
thirty-two cent? neters zone FOOT in
diameter. The enlargements were
made directly on silver bromide paper.
The inherent difficulty of connecting
the single plates 90 as to avoid any
break was overcome so successfully
that it is practically impossible TO de
tect the boundary line OF any two
plates. According 10 their character,
the six negatives were exposed for un-
equal periods, varying between one
half and one and onc-fourth hours.
In order to develop the picture, a
huge wheel was made of specially pre-
pared wood. The wheel was four
meters thirteen and twelve one-hun-
dredths feCU in diameter and one and
tbree-fourths meters Give and one-half
fcet in breadth, the periphery thus be-
ing twelve and one-half meters forty
one feeU, and containing ninety Stats
intended for receiving the Photographic
paper. There were further used three
large tanks 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
Wfty-two and forty-eight hun
dredths feet i'm length. \ gigantic
water tank. fifteen meters forty-nine
and one-fifth feet in length, two meters
(siX and tifty-siX One-huudredths feet
in breadth, anG three-fourths meter
two and forty-six one-hundredths feet
In height, having a total capacity as
high as 47G.GS 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 a protecting cover, was
laid over the Stats OF the wheel. The
wheel was then set rotating. As it
turned, it dipped the lower part Of the
paper into the developing liquid. The
light portions were especially treated
with spongcs impregnated with ener-
getic developers. Portions whose de-
veiopment was too rapid were checked
by means Of iced acetic acid solutions.
An iron oXalate developer was used.
After first interrupting the develop
Ing process by projecting iced acetic
acid on the photograph by means Of n
hand pump, the paper was conveyed
into an acetic acid bath. where the
clearing process was completed after
twenty minutes time The picture,
after m intense rinsing. was trans
ferred into the fixing bath, where it re.
mained threequarters OF an hour.
After another rinsing the photograph
was thence conveyed into the large
washing tank above mentioned. where
II remained FOR about eight hours,
while n continuous supply and with
drawal Of water took place. The total
consumption Of water used in washing
the print was about 1888 cubic feet.
After the water was drawn of. the
picture was stretched out on wooden
bars attached 20 the upper edge OF the
tank. where il remained for about ten
hours before IL was completely dried
Berlin Correspondent Of the Scientific
American.