Scientific American, Vol. 86, No. 14 (April 1902)
A single April 1902 issue of Scientific American, the New York weekly of invention, patents and industry published by Munn & Co. for engineers, manufacturers and technically curious general readers. Its pictures mix halftone photographs and wood-engraved advertising cuts of boilers in cutaway, stationary and marine gas engines, propellers and machine parts, with small block type set into the image area — useful for mechanical silhouettes, cross-section shading and period ad layout.
