Scientific American, Vol. 34, No. 9 (1876)
This is an 1876 issue of the Scientific American, a weekly American periodical aimed at engineers, mechanics and inventors, and its wood-engraved pages report new machines, tools and devices. The four pictures show a steam boiler and furnace, a cutter-and-gear metal machine with a detail view, an adjustable wrench drawn in section, and a lath-holding frame for plastering, all rendered in fine black line with labelled parts that a designer could use as clear mechanical diagram references.
