Scientific American, Vol. 33, No. 6 (1875)
Scientific American, volume 33, number 6 (1875), is a weekly American science and invention periodical for a general technical readership of engineers, mechanics and inventors. Its pictures are numbered mechanical engineering diagrams in fine black line engraving, showing metal-casting apparatus, chisel-like tools and brush or broom heads, with lettered parts labelled for reference; a designer might borrow their precise hatching and technical drawing style for industrial or vintage schematic work.
