Scientific American, Vol. 13, No. 2 (1865)
Scientific American, volume 13 number 2 from 1865, a weekly American periodical of mechanical and scientific news for inventors, engineers and tradesmen. The pictures are black-and-white wood engravings of patent mechanisms: a pipe wrench with sectioned threaded parts, a valve or faucet cutaway, a hand-held cutting or pressing tool with curved handles, and small machine parts drawn in section with labelled letters. Their crisp hatching and cross-section linework suggest clean, technical diagram conventions a designer could adapt for line-art icons or mechanical motifs.
