The science and practice of photography : an elementary textbook on the scientific theory and a laboratory manual
An elementary photography textbook by John R. Roebuck, published in New York and London by D. Appleton and Company in 1920, combining scientific theory with a laboratory manual for students. The pictures are plain line diagrams of optics: parallel rays converging through a lens to a focal point, and an object imaged at a distance with labelled focal lengths. A designer could borrow their clean schematic style and ray-tracing geometry for technical or educational graphics.
