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To Solve the Battle-Cruiser Problem, The Scientific Insurgent and more

The Miami Conservancy Flood Prevention Plan

Construction of Large Retarding Basins

By W. A. Drake

Fossils Found in Eastern Colorado

By Lorena S. Ellis

Reconstruction in Europe--V

"Labour"--Great Britain's Greatest Peace Problem

By C. H. Claudy

How Will the Gasoline Engine Develop?

Some of the Things That Intelligent Imagination Sees in the Future

By Howard Warren

The Vampire Bat

A South American Species That Lives Entirely on the Blood of Other Animal

By W. H. Ballou

U. S. Navy 7-inch Caterpillar Mount

By H. Delano

The North Sea Mine Barrage--II

Methods of Operation of the U. S. Minelaying Squadron

By Reginald R. Belknap

New York's Aeronautical Exposition

Observations at the Exposition and Some of the Conclusions Which May Be Drawn with Regard to Military and Commercial Aviation

The Wireless Compass

Piloting Ships into Port by Radio

By Jerome Lachenbruch

Reconstruction Department

A Department Devoted to the Improvement of Old and Development of New Lines of Manufacture

The Current Supplement

The Aerial Police


  • Letters

    Correspondence - March 22, 1919

  • Departments

    Inventions New and Interesting - March 22, 1919

  • Recently Patented Inventions - March 22, 1919

  • New Books, Etc. - March 22, 1919

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