Scientific American, Vol. 32, No. 18 (1875)
This is a weekly American science and invention magazine, Scientific American volume 32 number 18 from 1875, printed in New York for an general readership of engineers, mechanics and inventors. Its pictures are black-and-white engravings of machines drawn in precise line with cross-sections, labelled parts and lettered keys, so a designer can take mechanical diagram conventions such as hatching, exploded views and figure lettering.
