Scientific American, Vol. 21, No. 14 (1869)
A weekly American science and engineering periodical from 1869, published in New York for a general readership of inventors, mechanics and manufacturers. Its pages of wood-engraved cross-sections show boiler furnaces and related machinery, with the technical text set in narrow columns beside them. A designer could draw on the crisp, labelled line diagrams of brickwork, cylinders and fittings as a model for schematic technical illustration.
