Scientific American, Vol. 5, No. 50 (1850)
A weekly American science and invention newspaper from 1850, published for inventors, mechanics and general readers, with pages of patent-model engravings and short notes on new machines. Its pictures are plain line engravings of machines, one a straw cutter on a frame with a hand crank and gearing, the other a pair of mechanical lock or latch diagrams with lettered parts, which a designer might take from for clean technical line drawing and labelled schematic layouts.
