Scientific American, Vol. 32, No. 20 (1875)
This is a weekly American periodical of 1875 aimed at mechanics, inventors and engineers, carrying technical news and trade notices. The pictures are black-and-white line engravings of machinery: a heavy power press or stamping frame, a geared shearing or cutting machine with a worker, a fluted roller mill with clamp fittings, and a vertical pump with valves and pipework. A designer could draw on their dense, precise linework and the mechanical vocabulary of wheels, gears and frames for industrial graphics.
