The form of diaphragm opening, screen distance, focusing, etc., were fully explained by means of diagrams. ... 2, 000 candle-power, with semi circular reflectors, painted white (inside), give the following exposure in three parts: First, a cross stop, arms of cross reaching to f j 16 circle. ... The idea or intention of this third exposure is to force the dots through the gelatine. ... Ammonium chloride 2 Water 80 To reduce, if necessary, prepare the following: Ca Potassium ferricyanide 1 pound.
|Title||:||Anthony's Photographic Bulletin|