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Direct-Current Versus Single-Phase Traction

Distorted Bridge Stories

Signaling to Mars




A Tool for Boring Square Holes

Dynamiting the Niagara Ice Jam

By Orrin E. Dunlap

Why Drunken Men Always See Double

The Discoverers of the Hudson

Wells and Darwin, and the Doctrine of Evolution

Recent Successful French Monoplanes

The Winning Motor Boats at Monaco

The Electric Aerial Mono-Rail up the Wetterhorn

By The English Correspondent of the Scientific American

Back Pressure Reducer

Patent Department

Boiler-Tube Cleaner

Delivery Apparatus for Mail Cars

Oddities in Inventions


  • Departments

    Correspondence - May 8, 1909

  • Recently Patented Inventions - May 8, 1909

  • Notes and Queries - May 8, 1909

  • Patents - May 8, 1909

  • Index of Inventions - May 8, 1909

  • New Books, Etc. - May 8, 1909

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