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The Bureau of Invention and Development, Governmental Indifference to Invention and more

The Heart of the Locomotive

The Reason for the “Grasshopper” Valve Motions seen on Modern Locomotives

By C. H. Claudy

Strategic Moves of the War--July 14th, 1915

By Matthew E. Hanna

Which is the Most Powerful Battleship?

How the Big Gun Plus High Speed Make for Efficiency

By J. Bernard Walker

What Amount of Water Should be Used in Concrete Mixtures, Digging Battlefield Trenches by Machine and more

By H. Colin Campbell

Certified Watches, Pranks of a Cyclone and more

By L. William Thavis

The Thermaphone, Resurrecting a Dead Battery


  • Departments

    Correspondence - July 24, 1915

  • Inventions New and Interesting - July 24, 1915

  • Recently Patented Inventions - July 24, 1915

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