Scientific American, Vol. 24, No. 23 (1871)
Scientific American, volume 24, number 23, is a weekly American periodical of 1871 that printed mechanical and scientific news for engineers and inventors. Its pictures are plain black-and-white wood engravings of machinery, a rock-tunnelling machine in section, a railway fitting and a prism optics diagram, with clean labelled outlines that a designer could borrow for technical graphics.
