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 27
22 THE GRAMMAR OF PHOTO- ENGRAVING. more to a near object than a distant one. Take, for instance, the Fig. 9. … Fig. 9 The three rays of light, a, b, c, pass through the hole in the roof, falling upon a table ; the rays are reflected from the table upon the plane, d, e,f,g\ in this position all the rays strike the surface of the plane. If it was moved back to the posi- tion as represented by 2, only one ray…
Photoengraving
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
