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The Battle-cruiser, The Small Farm Tractor, and more


Progress in Small Farm Tractors

A Real Agricultural Need and What Engine Builders Are Doing to Meet it

By L. W. Ellis

The Submarine at Sea

Ingenious Construction and Appliances by Which the Submarine Has Obtained Its Present Efficiency
[Includes cross-sections of the typical German submarine and a Laurenti type]

More Mysteries of Ultra-violet Light

By Leonard Keene Hirshberg

Röntgen Motion Pictures

The Remarkable Dessauer Process

Location Of Motorcycle Power Plant Troubles

A Complete Chart Outlining the Common Derangements that Interfere with Proper Action of Engine and Auxiliary Systems

By Victor W. Pagé

Forcing the Dardanelles

Floating Mines and Gunfire Work Havoc on the Allied Fleet
[Prelude to the Gallipoli attack]

Freeing Condensed Steam From Oil, Food Production in the United States

Random Reflections, A Medal for the Inventor of Invar

By Irresponsible

Producing the Effective Temperature of the Sun, World's Largest Soup Kitchen and more

By Our Berlin Correspondent

The Zeppelin Raid on Paris, Our Neglected Aquatic Foods and more

By C. Dienstbach


  • Departments

    Correspondence - April 3, 1915

  • The Heavens in April

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