Scientific American, Vol. 7, No. 12 (September 1862)
A weekly New York patent and invention journal issued by Munn & Co. in September 1862, written for American inventors, machinists, and manufacturers tracking new claims and devices. The plates are small wood engravings of apparatus — a spirit-lamp still or water heater in exterior and sectional views, a cased tray with a hatched interior — numbered Fig. 1, Fig. 2, Fig. 3 and built from fine hatching, usable as cutaway diagrams, machine silhouettes, or figure-labelled spot art.
