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The Speed Factor in Collisions, Bigger Lifeboats for Ocean Liners and more

Teaching from the Child's Point of View

A New Science Created

By Ernst Meumann and P. R. Radosavljevich

The Vast Ore Deposits of Cuba, Treating Tuberculosis by Marine Micro-organisms and more

For illustrations see pages 146 and 147

By Henry Hale

Fighting in the Air, The Current Supplement and more

By C. Dienstbach

Buying and Selling Silver and Gold

The Scientific Side of the Assay Office at New York

By H. J. Slaker

Improvised Forge

By Robert K. Patterson

A Variable Speed Groove-pulley

By F. E. Keller

Cutting Keyways in a Lathe

By William H. Trueman

Lineman's Clamp from a Buggy Top, Workshop Notes

By Elbert S. Ramsay

Construction of a Water-tight Box

By W. A. L.

Expanding Socket for Screw Spikes, A New Noiseless Gear for Motor Cars and more

By A. B. Morrison

Flashlight Signaling for Railways

By Our English Correspondent

Large List of Prizes in 1914 Rubber Exhibit


  • Letters

    Correspondence - August 23, 1913

  • Recommended

    New Books, Etc. - August 23, 1913

  • Departments

    Recently Patented Inventions - August 23, 1913

  • Notes and Queries - August 23, 1913

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