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The Hope-Jones Unit Orchestra

By Moritz A. Jägendorf

More Information for the House Committee, Flying Around the World and more

Curing Noise in a Concrete Building

By E. P. Dorman

The German Observatory in Spitzbergen, Watching the World Revolve

Hitting the Bull's Eye at Six Miles

Target Practice in the United States Navy

By Thomas T. Craven

Eliminating the Flicker From the Moving Picture

A New System of Motion Picture Projection

By Joseph B. Baker

Where and How Radium is Obtained

The American Supply of the Most Precious Substance in the World

By John L. Cochrane

Platinum Deposits, Beet Sugar Industry in Great Britain


  • Letters

    Correspondence- February 14, 1914

  • Departments

    Inventions New and Interesting- February 14, 1914

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