Scientific American, Vol. 63, No. 1 (1890)
Scientific American, volume 63, issue 1 from 1890, a weekly American magazine of science and mechanical invention for general readers and engineers. Its pages carry numbered engraved diagrams of new patented devices such as belt tensioners, hydraulic engines, saw blades and wagon brakes, with lettered parts keyed to the text. The engravings are crisp black line drawings with hatching and shading, useful to a designer wanting clear mechanical linework and diagram labelling conventions.
