Volume 120, Issue 12
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Features
The Miami Conservancy Flood Prevention Plan
Construction of Large Retarding Basins
Fossils Found in Eastern Colorado
Reconstruction in Europe--V
"Labour"--Great Britain's Greatest Peace Problem
How Will the Gasoline Engine Develop?
Some of the Things That Intelligent Imagination Sees in the Future
The Vampire Bat
A South American Species That Lives Entirely on the Blood of Other Animal
U. S. Navy 7-inch Caterpillar Mount
The North Sea Mine Barrage--II
Methods of Operation of the U. S. Minelaying Squadron
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
Reconstruction Department
A Department Devoted to the Improvement of Old and Development of New Lines of Manufacture