The practical working of the gelatine emulsion process (1880)
Abney, William de Wiveleslie, Sir, 1843-1920, author · London : Piper and Carter · leaf 33
23 GELATINO-BROMO-IODIDE EMULSION. till a very small orifice is left. The two tubes are then inserted in a cork which is fitted into a test-tube as … shown. The silver nitrate is placed in the bottom of the tube, and a very fine spray of liquid can be forced into the orifice of A. The gelatine should be placed in a glass beaker or a jam pot, and in the dark room the spray is blown on to it, and the liquid stirred, at the same time, with a clean…
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