Scientific American, Vol. 30, No. 25 (1874)
Scientific American, volume 30, number 25, published in 1874, a weekly American periodical reporting on mechanical inventions, tools and industrial processes for an general readership of engineers, mechanics and inventors. The pictures are black-and-white wood engravings of machinery, with labelled figures and small advertisements set in dense columns of type; a designer could draw on their precise line work, crosshatched shading and mechanical detail.
