The practical working of the gelatine emulsion process (1880)
Abney, William de Wiveleslie, Sir, 1843-1920, author · London : Piper and Carter · leaf 22
12 THE DARK ROOM AND ITS FITTINGS. box ought to be placed in a warm and very dark room.’7 … As to the necessity of warmth in the room we demur. It is not necessary if arrangements be made for burning a gas jet in the top tube, so as to create a draught. The next diagram (fig. 4) will give an idea of Mr. England’s plan for plates up to 12 by 10 inches. A box is made of the dimensions…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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