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Some Interesting Facts about the Development of the Edison Storage Battery

Commemoration of the Louisiana Purchase

Battleship or Torpedo Boat

The Current Supplement

Action of Radium on Metals

The Russian Ice-Breaker "Ermack"

Experiments with Three-Phase Electric Arcs

High-Velocity 6-Inch Wire-Wound Gun for the United States Army

Growth of Our Navy

The Louisiana Purchase Exposition--Its Scope and its Purpose

By Samuel Williams

The Largest Clock in the World

By Claude H. Wetmore

Patent Department

A New Electric Clock

The Hydraulic Letter Press

Strainer for Locomotives

A Combined Third-Rail Contact Shoe and Sleet Remover

A Novel Mail-Bag Catcher

A New Wrench

Business and Personal Wants


  • Departments

    The Heavens in May - May 7, 1904

  • Recently Patented Inventions - May 7, 1904

  • Notes and Queries - May 7, 1904

  • New Books, Etc. - May 7, 1904

  • Index of Inventions - May 7, 1904

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May 07, 1904

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