Bromide paper : instructions for contact printing and enlarging
A late nineteenth-century photography manual by E. A. Just, published in Bradford in 1896, instructing amateur and practical photographers in contact printing and enlarging on bromide paper. Its four pictures are plain line diagrams of lamp, lens and ray paths with labelled points, showing how light projects an image onto a sheet; a designer could take their clean, schematic geometry for technical or scientific explainer graphics.
