Scientific American, Vol. 25, No. 16 (October 1871)
A single October 1871 issue of Scientific American, the weekly patent and mechanics' journal published by Munn & Co. in New York for inventors, machinists, and manufacturers. The wood engravings show apparatus in cutaway section and three-quarter view — recording gauges, safety valves, lock mechanisms — with lettered part keys, ruled hatching for cast iron and wood, and figure numbers set above each view.
