The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular (1877)

Record Details:

Title:
The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular
Date:
1877
Publisher:
Philadelphia, J. A. Moore
Volume:
The sciopticon manual, explaining lantern projection in general, and the sciopticon apparatus in paricular
Leaf #:
00077
Language:
English
Collection:
Books
Format:
Books
Contributor:
University of California Libraries
Sponsor:
MSN
Coordinator:
Media History Digital Library
Description:
Date Added:
July 19, 2022
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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 be 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 answer; 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.