Scientific American, Vol. 25, No. 2 (1871)
Scientific American, volume 25, number 2 from 1871, is a weekly American periodical of mechanical and scientific news aimed at inventors, engineers and general readers. Its pages carry wood-engraved drawings of machines and tools, including a boring bit with a brace, a vertical steam engine with a large flywheel, a Camden steam pump, and a pipe-cleaning apparatus shown in several sections. The engravings are dense, precise line drawings with crisp outlines and cast shadow, useful for studying mechanical form and hatching technique.
