Scientific American, Vol. 31, No. 22 (1874)
Scientific American volume 31, number 22 from 1874 is a weekly American periodical of mechanical and industrial news, aimed at engineers, inventors and tradesmen. Its pictures are wood-engraved mechanical diagrams: a sectional furnace or stove, a brick viaduct elevation, a wrench and bolt assembly, and a wooden clamp with pivoted dogs, all drawn in clean line with lettered reference marks a designer could borrow for technical graphics.
