Scientific American, Vol. 17, No. 7 (1867)
Scientific American, volume 17, number 7 from 1867, a weekly American periodical of mechanical and industrial news for engineers, inventors and tradesmen. The pictures here are wood and steel engravings of mechanical devices, with technical figure labels, lettered parts, and cutaway views. A designer could draw on their precise, diagrammatic line work, the labelled cross-sections of valves and pipe joints, and the plain engineering draughtsmanship of the period.
