Scientific American, Vol. 29, No. 15 (October 1873)
A weekly issue of Scientific American from October 1873, published in New York by Munn & Co. for inventors, engineers and mechanics following new patents and processes. Wood engravings show machine parts in three-quarter view — spoked flywheels, split pillow-block bearings, belt-driven shop machinery — modeled with dense line hatching and cast shadows usable as isolated mechanical silhouettes.
