Traité pratique de perspective : appliquée au dessin artistique et industriel
A practical perspective manual by Armand Cassagne, published in Paris by A. Fouraut in 1889, written for artistic and industrial drawing. Its plates are line diagrams of geometric solids such as cubes, pyramids and prisms, each built with vanishing points, horizon lines and construction lines drawn in fine strokes. A designer could take from them the clear method of projecting a three-dimensional form onto a flat plane, with hatching used to separate faces.
