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Keeping the River Tunnel Dry, Spontaneous Combustion Temperatures of Liquid Fuels and more

By M. A. Henry

Our Future Oil Supply

A Hopeful View of the Possibilities of the Mexican Fields

By A. Hooton Blackiston

How a Road Rests in its Bed, Soap from Lignite Tar Oils

By S. R. Winters

Scrapping Good Machinery for Better Service

By H. A. Mount

The Romance of Invention--XV

Frederic E. Ives, Wizard of Color and Light, and Father of the Half-Tone

By C. H. Claudy

Our Mechanical Eyes

Glass for Optical Purposes, and How It Is Made

By J. F. Springer

Keeping the Camera on an Even Keel, Telephoning in Cipher

By J. E. D. Meador

Learning by Seeing

By George H. Dacy

The America's Cup Races

Notes on the Contests for 1920

By J. Bernard Walker

Australian "Blackboy" Tree


  • Departments

    Correspondence - July 31, 1920

  • The Heavens in August, 1920

  • The Service of the Chemist

  • Inventions New and Interesting - July 31, 1920

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