Scientific American, Vol. 80, No. 21 (1899)
Scientific American volume 80, number 21 from 1899 is a weekly American periodical of science and invention, printed in New York for engineers, inventors and general readers. Its pages carry engraved diagrams of machines, apparatus and mechanical devices with lettered parts and numbered views. The pictures are precise line engravings with light grey wash, so a designer could borrow their clean technical diagram style, labelled callouts and muted tonal shading for industrial layouts.
