Scientific American, Vol. 5, No. 38 (1850)
Scientific American, volume 5, number 38 from 1850, a weekly American periodical for inventors, mechanics and general readers, printed in New York. Its pictures are plain line engravings of machinery with lettered reference points, the first showing a cylindrical steering gear with a rudder post and the second a sectioned vertical machine with a central shaft and gearing; a designer could take from them the clear diagrammatic style of nineteenth-century technical drawing, with hatching, labelled parts and dense cross-sections.
