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United States and British Gunnery

Combined Reciprocating and Turbine Engines

Fulton the Father of Commercial Steamboat Navigation

Health Conditions in the Subway

The Competition for the Scientific American Flying Machine Trophy

“Black Art” Redivivus

Striking a Light

By Percy Collins

Some Notable German Bridges

By F. C. Kuntz

The Races for the Astor and King's Cup

The Sheep-Killing Kea

By George R. Marriner

Variable Pressure Mechanism for Air Brakes


  • Departments

    The Heavens in September

  • Index of Inventions

  • New Books, Etc.

  • Recently Patented Inventions

  • Patents

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