A treatise on photography
A treatise on photography by Sir William de Wiveleslie Abney, published by Longmans, Green and Co. in London and New York in 1888, aimed at practising photographers and students of the craft. Its pictures are line-engraved technical diagrams of camera and optical apparatus, showing lens mounts, a box camera with bellows, a light-path schematic and a shuttered plate holder, drawn in clean hatched outlines that a designer could borrow for mechanical or scientific graphics.
