Scientific American, Vol. 5, No. 15 (October 1861)
An issue of Scientific American from October 1861, a weekly New York trade paper reporting patents and inventions to American mechanics and manufacturers. Wood engravings show patented devices in figure-lettered diagrams: hollow metal spheres and hemispheres with valves and chains, and a wood-framed washing machine with crank wheel, all modeled in fine parallel hatching.
