Scientific American, Vol. 80, No. 20 (1899)
A weekly American science and invention magazine from 1899, Scientific American Vol. 80, No. 20, published in New York for engineers, mechanics, and general readers of technical news. Its pages mix engraved mechanical drawings, apparatus diagrams, and text columns, with captions naming each device. The pictures show tire-bolt wrenches, a train-pipe coupling, a railroad safety appliance with a locomotive, and a laboratory pneumatic chamber, giving a designer clear, labelled period machinery drawings with a restrained engraved manner.
