Scientific American, Vol. 5, No. 34 (1850)
Scientific American volume 5, number 34 from 1850 is a weekly American periodical reporting on inventions, machines and mechanical science for a general readership of inventors and mechanics. Its pictures are black-and-white wood engravings of machinery: a lever-and-gear mechanism in elevation, a pair of large cylindrical rollers drawn in hatched line, and a two-wheeled seed drill with spoked wheels and a hopper, all shown with clear outlines and dense cross-hatching that a designer could borrow for technical diagrams.
