Scientific American, Vol. 32, No. 19 (1875)
Scientific American, volume 32, number 19, a weekly American science and engineering periodical from 1875, printed in New York for engineers, mechanics and inventors. Its pages carry wood-engraved mechanical drawings of boilers, safety valves and governors with lettered reference figures. A designer could take from them the crisp hatched linework and tidy labelled-diagram layout typical of nineteenth-century technical print.
