Scientific American, Vol. 20, No. 24 (June 1869)
A single issue of Scientific American, the New York weekly of patents, machinery and trade news, published June 1869 for inventors, mechanics and manufacturers. The engravings are small technical diagrams — sectional and plan views of furnaces, stoves, valves and vessels, hatched and stippled, with letter keys and "Fig." captions — useful as cutaway schematics, hatching textures and figure-label typography.
