Scientific American, Vol. 33, No. 3 (1875)
A weekly American science and invention magazine volume from 1875, printed for engineers, inventors and general readers interested in mechanical and electrical developments. Its engraved plates show machines such as a Lotz engraving machine, a magneto-electric light machine and an apparatus with gears and a vertical column, drawn in fine black line with dense hatching and clear cast shadows that a designer could borrow for technical diagram styling.
