Scientific American, Vol. 16, No. 2 (1867)
A weekly American science and engineering periodical from 1867, printed in New York for inventors, mechanics and general readers, offering patent-era machine drawings. The pictures show a lumber-tenoning machine with numbered figures, a patent spoke-tenon, a valve or cock with cutaway sections, and a lever linkage with a shaded backdrop, giving designers clear mechanical line diagrams with lettered parts and hatched cutaways.
