Scientific American, Vol. 10, No. 7 (1864)
A weekly American science and invention periodical from 1864, printed in New York for a general readership of inventors, mechanics and engineers. Its pages show patent-era mechanical devices drawn in numbered figures, including a clock-face mechanism, a rear-mounted box with a row of slots, a wheel with curved spokes, and a wood-framed lever assembly. A designer could draw on the crisp hatched line work and the labelled, diagrammatic clarity of these Victorian technical plates.
