Scientific American, Vol. 31, No. 7 (1874)
A weekly American science and technology periodical from 1874, set in small-type columns with engraved views of machines and apparatus for an engineering and inventor readership. The pictures are line engravings of machinery: a geared press frame with a large flywheel, a vertical boiler or tank with tubes, a shaft-and-pulley mounting with lettered details, and a sectioned furnace with stacked tubes. For a designer they offer dense mechanical linework, hatched shading and lettered callouts that suit industrial or retro technical graphics.
