Scientific American, Vol. 42, No. 23 (1880)
Scientific American, volume 42, number 23 from 1880, a weekly American periodical of science, invention and industry written for general readers and engineers. The pictures are technical engravings of apparatus: a selenium camera with lens tube and wiring, a folding mirror on a pedestal, and an advertisement for rifles and boiler directories. Their clean line work, labelled figure keys and plate numbers show how 19th-century technical diagrams organised information for a designer studying engraved schematics.
