Scientific American, Vol. 30, No. 18 (1874)
A weekly American science and engineering periodical from 1874, volume 30, issue 18, written for inventors, mechanics and general readers. Its pages mix engraved machinery with dense columns of text. The pictures are black-and-white wood engravings of mechanical devices, including a steam boiler attachment, a governor valve cutaway, a locomotive with signal bells, and a spring-ball governor, offering designers dense, precise technical linework and period machine detail.
