Bauhaus-Universität Weimar

Titel:
The Sciopticon Manual, Explaining Lantern Projections in General and the Sciopticon Apparatus in Particular Including Magic Lantern Attachments, Experiments, Novelties, Colored and Photo-Transparencies, Mechanical Movements, etc.
Person:
Marcy, L. J.
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit39449/60/
68 
SCIOPTICON MANUAL. 
of white light than from any other cause. A square¬ 
sided lantern, having the white glass removed, and yel¬ 
low substituted, will he found very convenient ; cither 
gas, a candle, or kerosene can be used for illumination. 
To prevent the collodion film slipping from the plate 
during the process, it is absolutely necessary that the 
glass plate should be albumenized. Wash the glass 
(having previously roughened the edges), drain, and 
while wet flow over it the following solution : 
Albumen (the white of an egg), .... 1 egg. 
Water,.............1 pint. 
Concentrated Ammonia,.......10 drops. 
Put the albumen in a clean bottle, then add the water. 
Shake a little, and add the ammonia; filter through a 
sponge ; dry in a rack. 
COLLODION. 
Any reliable collodion will answor; it is best to have 
it quite thick. No backing is necessary. 
NEGATIVE BATH. 
Nitrate of Silver,.........45 grains. 
Water,.............1 ounce. 
Made slightly acid with nitric acid, C.P. Dip the 
collodionized plate in the bath, and when properly ex¬ 
cited, remove the plate, and dip in a bath of pure water ; 
then wash under a tap with running water. While wet 
apply the 
PRESERVATIVE SOLUTION. 
Tannin,............10 grains. 
Gum Arabic,........ 6 “ 
Sugar,...... 4 “ 
Water,.............1 ounce. 
Filter, and add one drachm per ounce of 
Gallic Acid,...........24 grains. 
Alcohol,............1 ounce.
        

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