The grammar of photo-engraving : containing instruction in drawing, chemistry and optics, as applied to photo-engraving, and a practical treatise on the art of half-tone, zinc etching, swelled gelatine, lithotype and chalk plate engraving, as practiced in the United States (1895)
Farquhar, H. D. (Harry D.), Eder, Josef Maria, 1855-1944 · London : Dawbard & Ward · leaf 36
nce, precipitated from its solution by zinc, forms a crystalline solution. Concentration. The evaporation of a part of a liquid in order to increase the strength of the remainder is termed concentration. Thus the silver bath may, through accident, be too much diluted ; it can be strengthened by… … Fig. 15 means of a syphon. If, however, a syphon cannot be used and the vessel has no mouth or lip, and whose side is straight,
Photoengraving
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
