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Commemoration of the Louisiana Purchase

Some Interesting Facts about the Development of the Edison Storage Battery

Battleship or Torpedo Boat

The Current Supplement

Action of Radium on Metals

Experiments with Three-Phase Electric Arcs

The Russian Ice-Breaker "Ermack"

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

A New Electric Clock

Patent Department

The Hydraulic Letter Press

Strainer for Locomotives

A Combined Third-Rail Contact Shoe and Sleet Remover

A New Wrench

A Novel Mail-Bag Catcher

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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