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Steady Improvement in Naval Gunnery

The Lumiere Single-Plate Process of Color Photography

Around the World in Forty Days

Relative Risk of Overhead and Third-Rail Conductors

The Rail Situation

By J. Kent Smith

Engineering Notes - July 20, 1907

A New Automobile Boat

By Jacques Boyer

An Exhibition of Fruits and Vegetables in Wax

By Cara Reese

The Moon's Phases and Eclipse in July, 1907

By Frederic R. Honey

Osborne College: An English Naval School

By Henry Hale

A New Identification System in the United States Army

By H. L. Morgan

Ionic Therapeutics


  • Departments

    Correspondence - July 20, 1907

  • Index of Inventions - July 20, 1907

  • Recently Patented Inventions - July 20, 1907

  • Patents - July 20, 1907

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