Scientific American, Vol. 2, No. 34 (May 1847)
A weekly issue of Scientific American from May 1847, published in New York for inventors, mechanics and patent readers. Wood-engraved patent diagrams show sectional and bird's-eye views of a rotary steam engine with lettered callouts, plus an ornamented masthead vignette with eagle, gears and tools, and engraved pencil cases; useful for machine cross-sections, keyed labels and industrial emblem devices.
