Scientific American, Vol. 21, No. 2 (1869)
Scientific American volume 21, number 2 from 1869 is a weekly American periodical of mechanical and scientific news, published in New York for an engineering, inventing and general technical readership. Its pictures are wood-engraved line drawings of instruments, a ship's machinery, a plough and a fastener, each with lettered reference marks and numbered figures that a designer could borrow for technical diagrams with a nineteenth-century look.
