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Peace, Congress and Our Naval Air Service and more

Phonograph Needles of Bamboo

Some of the Manufacturing Details Involved in the Search for Softness of Tone

Some American Substitutes for Rubber

Their Value from the Viewpoint of the Investor and the General Consumer

By Frederic Dannerth

Great Britain's Giant Bombing Plane

The Tarrant Triplane or the Story of a Bold Experiment in Airplane Construction

Great Changes in the Planet Jupiter, How the Meteorologist Aids the Aviator

By W. F. Denning

Our High Prices--Have they Come to Stay?

Professor Irving Fisher's Forecast and Advice to Business Men

By Alfred J. Lotka

Taking the Plod Out of Plowing, The Natural Triangulation Station and more

By C. E. Gapen

Allied Nations Scientific Academies to Those of the Central Powers

Water Resistant Glues, Variations of Length Caused by Magnetization


  • Departments

    Correspondence - July 5, 1919

  • Inventions New and Interesting - July 5, 1919

  • Recently Patented Inventions - July 5, 1919

  • New Books, Etc. - July 5, 1919

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