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 152
HAND or STAND CAMERAS. … THE FEATHERWEIGHT. A Came'a, Wide Angle, double extension, for Hand or Stand, for pictures 6k by 4f in., weighing' only 17 ounces. With the New Zeiss Satz- Anastigmat Lens, giving focal lengths of 7, n|, and 14 inches. The most compact and portable outfit yet manufactured. Made in 6k by 4f and 8k…
Photoengraving
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.