Scientific American, Vol. 26, No. 1 (1872)
A weekly American periodical of 1872 aimed at inventors, engineers and general technical readers, presenting new machines and devices through engraved line drawings with lettered parts. The pictures are mechanical engravings of gears, drive wheels, a steam heating boiler and a blind wiring machine, with fine parallel hatching for metal and dense cross-hatching for shadow. A designer could draw on their clear part-labelling and crisp diagrammatic line for technical or industrial graphics.
