The science and practice of photography : an elementary textbook on the scientific theory and a laboratory manual (1920)
Roebuck, John R. (John Ransom), 1876-1965 · New York ; London : D. Appleton and company · leaf 59
GELATINE DRY PLATE 37 overexposure. And fourth, the final bending down part is called the period of reversal. We will con- sider the second part in detail first. … Fig. 5. 26. Period of Correct Exposure.' — In the dia- gram, ab is a straight line within the error of ex- periment. Let X be any point on it, and draw xy at right angles to cy. Then wherever x may be on ab, the triangle xyz remains similar, that is y (yz) = xy where y (gamma) keeps the same value,…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
