Scientific American, Vol. 47, No. 11 (1882)
This is a weekly American science and engineering periodical from 1882, a single issue of Scientific American, with its engravings made for a general readership of engineers and inventors. Its pictures are black-and-white wood engravings of machinery: an injector mounted on a locomotive, the valve gear and end elevation of an air locomotive, and cutaway sketches of injector sections with labelled parts. A designer could take from them the dense, labelled line-work of nineteenth-century mechanical draughtsmanship, with its crosshatched metal, lettered callouts and precise cutaway views.
