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The Need of an Automatic Stop, Agriculture in the High Schools and more

Thirty-six Hours Under Water

A Submarine Propelled by Gasoline Engines While Submerged

By Charlton Lawrence Edholm

A New Way of Studying Astronomy

The Ingenious Celestial Sphere Invented

By Wallace W. Atwood

To the South Pole with the Cinematograph

Film Records of Scott's Ill-fated Expedition

The Greatest Steamer in the World

Some of the Important's Marvels

Blasting With Liquid Air

By Our Berlin Correspondent

Price Maintenance and Modern Merchandising--I

Price Fixing by a Monopoly and Price Fixing by a Single Manufacturer

By Waldemar Kaempffert

A New Road Material, A Septuagenarian Arctic Explorer and more


  • Recommended

    New Books, Etc. - June 21, 1913

  • Departments

    Inventions New and Interesting - June 21, 1913

  • Recently Patented Inventions - June 21, 1913

  • Notes and Queries - June 21, 1913

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