Scientific American, Vol. 40, No. 22 (1879)
This is a weekly American periodical of 1879 aimed at general readers interested in science, invention and mechanics, with engraved illustrations of new machines and apparatus. The pictures show a pendulum-like device over a ring, a finned coil heater in a casing, geared machinery with lettered parts, and a raised wooden platform with stairs and a hoist. A designer could draw on their precise line engraving, dense hatching and clean mechanical diagramming for technical vignettes.
