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More Starting Power for the Steam Locomotive, An Announcement and more

The Disaster to One of Our Latest Submarines

How an Air Valve, Inadvertently Left Open, Caused S-5 to Plunge to the Bottom

Bomb-proof Coal Mining

By S. R. Winters

Timing the Hundred-Mile-Per-Hour Racer

By Ralph Howard

The Oil-Field Geologist

How Science Has Made Gambling on Petroleum Prospects a Thing of the Past

By O. R. Geyer

The Toolmaker's Tools

The Modern Art of Grinding, and How the Wheels That It Uses are Made

By W. F. Sutherland

Solving the Labor Problem--I

The Development of an Industrial Policy of Mutual Interest Between Employer and Employee

By George M. Verity

Reconstructing Stonehenge

Work of Preservation That May Solve the Origin of Britain's Most Mysterious Ruin

By Harold J. Shepstone

To Make Hens' Eggs Hard, "Flu" Experiments on Monkeys


  • Departments

    Inventions New and Interesting - September 25, 1920

  • Recently Patented Inventions - September 25, 1920

  • New Books, Etc. - September 25, 1920

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