Scientific American, Vol. 26, No. 6 (1872)
Scientific American, volume 26, number 6 from 1872, a weekly American periodical of science and invention aimed at engineers, inventors and general readers. Its pages mix patent-style mechanical drawings with diagrams of optics and electricity. The engravings are fine black-and-white line work, with the mechanical sketches showing wheels, bearings and frames in clean outline, and the optical diagrams using crisp converging ray lines over dark ground, useful to a designer seeking precise technical line drawing and diagram structure.
