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Col. Goethals on the Culebra Slides, State Versus Federal Control of the National Forests and more

New Types for the Japanese Navy, Dussaud's "Cold Light"

By Oscar Parkes

Shall We Build Battle Cruisers?

Every Big-gun Cruiser Would Mean One Less Battleship in the Fighting Line

By R. D. Gatewood

The Enlargement of the Aswan Dam

By the English Correspondent of the Scientific American

The Altamira Wall Paintings

Some Remarkable Specimens of Primitive Man's Art

Sharpening Edge Tools

By W. D. Graves

Cutting Keyways With a Lathe, Making a Socket Wrench

By H. D. Chapman

Chair Making One Hundred Years Age, Lettering Triangle

By Albert F. Bishop

Notched Lathe Dog, Straightening a Back Saw

By William Grtzinger

Strap Hinges vs. T-Hinges

By G. W. D.

Automatic Fog Gun

By E. O. Carter


  • Departments

    Inventions New and Interesting - February 8, 1913

  • Recently Patented Inventions - February 8, 1913

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