Scientific American, Vol. 30, No. 20 (1874)
A weekly American periodical of 1874 reporting on science, invention and mechanical industry for a general readership of engineers, inventors and tradesmen. The pictures are black-and-white wood engravings of machines, each shown in a plain three-quarter view with fine hatching and labelled captions, offering a designer clear period examples of industrial machine drawing and typographic captions.
