Scientific American, Vol. 21, No. 25 (1869)
Scientific American volume 21, number 25 from 1869 is a weekly American periodical for engineers, inventors and general readers, printed in New York. Its wood-engraved pages show mechanical and technical devices with numbered figures and short descriptive text. The engravings are crisp line drawings with clear cross-hatching, useful for designers wanting period technical diagrams, labelled apparatus and machine-part views.
