Scientific American, Vol. 21, No. 16 (October 1869)
A weekly issue of Scientific American, published in New York in October 1869 for inventors, patent applicants, and working mechanics. Wood-engraved figures show gang saws, a brick-making press, a small steam engine on scrolled legs, and numbered detail views of machine parts, drawn in fine hatching against blank grounds for use as isolated mechanical spot art.
