Scientific American, Vol. 30, No. 12 (1874)
This is a weekly American periodical, Scientific American volume 30, number 12 from 1874, published in New York for a general readership of inventors, mechanics and engineers. Its pictures are black-and-white wood engravings of mechanical devices shown in clear line drawings with lettered reference points, with shading that defines metal edges and cast forms, useful to a designer studying Victorian technical illustration and diagram layout.
