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Features

Combined Reciprocating and Turbine Engines

United States and British Gunnery

Health Conditions in the Subway

Fulton the Father of Commercial Steamboat Navigation

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

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    The Heavens in September

  • Index of Inventions

  • Recently Patented Inventions

  • New Books, Etc.

  • Patents

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August 31, 1907

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