Scientific American, Vol. 7, No. 24 (December 1862)
A weekly issue of Scientific American, published by Munn & Co. in New York in December 1862, reporting new patents and inventions for American mechanics, manufacturers, and inventors. The engravings mix labeled machine elevations and cross-sections with hatched shading — bearing blocks, flywheel-driven benchtop machines, a hand-cranked churn shown in three figures — useful for lettered diagram keys, mechanical line work, and hatch textures.
