Scientific American, Vol. 31, No. 13 (1874)
This is a weekly American periodical of 1874 aimed at inventors, mechanics and general readers, printed in New York and reporting new patents and engineering. Its wood-engraved pictures show machines and devices with labelled parts and cutaway views, typical of mid-nineteenth-century technical illustration. A designer could draw on the clear line hatching, the lettered reference points and the exploded-detail layout for mechanical diagrams.
