Scientific American, Vol. 12, No. 51 (August 1857)
A weekly issue of Scientific American from August 1857, published in New York for inventors, patent applicants and mechanics, reporting new patents and machine improvements. The wood engravings show machines in three-quarter perspective with lettered parts and cutaway sections \u2014 a seed drill, a cylindrical mill with internal vanes, a rail-mounted planing frame, pipe couplings \u2014 useful for cut-out machine parts, hatched shading and technical lettering.
