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Reducing the Noise of Elevated Roads

The Truth About the German “Dreadnoughts”

“House Fly” Should be Called “Typhoid Fly”




A New Class of Submarines for the United States Navy

The Amphibicycle

By the Paris Correspondent of the Scientific American

The New Croton Falls Reservoir

Submarine Wrecking Vessel

Steering of Ships

Tricks with Soap Bubbles

By Percy Collins

The Great Ice Jam at Niagara

By F. C. Perkins


  • Departments

    Correspondence - May 1, 1909

  • The Heavens in May

  • Index of Inventions - May 1, 1909

  • Patents - May 1, 1909

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