Volume 108, Issue 24
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Features
Tests on a 10,000 Horse-power Fttinger Transformer
Hydraulic Gear for Marine Turbines
The Japanese and American Navies Compared
How Japan is Outstripping America
Mining the Air with Balloon Torpedoes
The Langley Aerodynamical Laboratory
"The Mysterious Problem", The Current Supplement and more
A Project to Raise Decatur's Frigate the "Philadelphia", The American Road Congress and more
Bacteriology and Your Health
Serums and Vaccines in the Diagnosis, Treatment and Prevention of Disease
Optical Phenomena Seen from Balloons, Nomenclature of the Polar Regions
Shape and Sound in Whistles
Night Golf Putting Course, Automobile Traction in Italy
An Intensifier for Telephone Transmission
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