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The Problem of the Small Tractor, The Japanese and the American Navies and more

Tests on a 10,000 Horse-power Fttinger Transformer

Hydraulic Gear for Marine Turbines

By Alfred Gradenwitz

The Japanese and American Navies Compared

How Japan is Outstripping America

By Percival Hislam

The Langley Aerodynamical Laboratory

By Carl Hawes Butman

Mining the Air with Balloon Torpedoes

By H. Bannerman-Phillips

"The Mysterious Problem", The Current Supplement and more

By Clarence T. Hubbard

A Project to Raise Decatur's Frigate the "Philadelphia", The American Road Congress and more

By H. C. Plummer

Bacteriology and Your Health

Serums and Vaccines in the Diagnosis, Treatment and Prevention of Disease

By Charles F. Bolduan

Shape and Sound in Whistles

By Gustave Michaud

Optical Phenomena Seen from Balloons, Nomenclature of the Polar Regions

By C. Fitzhugh Talman

Night Golf Putting Course, Automobile Traction in Italy

By T. J. Litle

An Intensifier for Telephone Transmission

By Jacques Boyer

The Supreme Court of the United States on Price Maintenance

The Industrial Need of Technically Trained Men--IV

Why There is Place in Business for Men Technically Trained

By John Ritchie


  • Recommended

    New Books, Etc. - June 14, 1913

  • Departments

    Inventions New and Interesting - June 14, 1913

  • Recently Patented Inventions - June 14, 1913

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