Scientific American, Vol. 24, No. 7 (1871)
A weekly American science and invention periodical from 1871, printed for engineers, mechanics and inventors, showing machines and mechanisms with numbered figure captions. The pictures are precise line engravings of machinery: a pump-driven water wheel with geared shaft, a dovetailing machine with belt pulleys and cast iron frame, a large spoked wheel mounted on a trestle frame, and a lathe face plate with a boring setup. A designer could take the clean hatched line work and the clear technical diagram layout as a reference for mechanical drawing.
