Scientific American, Vol. 33, No. 21 (1875)
Scientific American, volume 33, number 21, is a weekly American periodical of 1875 that reported new inventions and mechanical engineering for a general readership of inventors, mechanics and manufacturers. Its pictures are wood-engraved diagrams of machines, including a water hoist, a broom-sewing machine, a gun-soldering machine and a pair of tubular fittings. A designer could draw on their crisp hatching and labelled detail views for period mechanical drawing.
