Scientific American, Vol. 21, No. 9 (1869)
Scientific American, volume 21, number 9, is a weekly American periodical of 1869 that reported on new inventions and mechanical patents for an engineering and workshop readership. Its pictures are plain line engravings of machines, with a horse-drawn gear, a band saw on a Gothic-arched frame, and a roller apparatus diagram, offering a designer clear examples of Victorian mechanical drawing and labelled technical plates.
