Les Raisons Des Forces Movvantes: Auec diuerses Machines Tant vtilles que plaisantes ...
Les Raisons des Forces Mouvantes is a 1615 treatise on machines by Salomon de Caus, held by Heidelberg University Library and written for engineers and curious readers in French. Its pictures are dense copperplate engravings of hydraulic and mechanical devices, showing pulleys, waterwheels, gears and framed machine housings drawn with fine crosshatching and lettered reference points, which a designer might use for mechanical line work and diagrammatic detail.
