Volume 123, Issue 13
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Features
The Disaster to One of Our Latest Submarines
How an Air Valve, Inadvertently Left Open, Caused S-5 to Plunge to the Bottom
Timing the Hundred-Mile-Per-Hour Racer
Bomb-proof Coal Mining
The Oil-Field Geologist
How Science Has Made Gambling on Petroleum Prospects a Thing of the Past
The Toolmaker's Tools
The Modern Art of Grinding, and How the Wheels That It Uses are Made
Solving the Labor Problem--I
The Development of an Industrial Policy of Mutual Interest Between Employer and Employee
Reconstructing Stonehenge
Work of Preservation That May Solve the Origin of Britain's Most Mysterious Ruin