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To Benefit by a Great Dam

Must We Grow Old?

Lahoratory Research hy Noted Scientists Gives Ground for Some Hope that We Shall Ultimately Learn to Forestall Old Age, Even Live Eternally

By Barclay Moon Newman

The Earth's Pulse

How the Scientist Goes About the Interpretation of the Wavy Lines—Signatures of Earthquakes—Recorded on the Moving Drum of the Seismograph

By Rev. Joseph Lynch

Indian Petroglyphs Idle Scribblings?

Inside the Great Planets

There is Evidence that Matter Within SOle of the Greater Planets Exists in Forms and Conditions that Would Seem Bizarre to Dwellers on Our Earth

By Henry Norris Russell

Grand Coulee Progresses

Monster Dam and Appurtenant Works Will Cost Over 376 Millions, Dimensions, Components, Progress of Work, Difficult Problems Met

By R. G. Skerrett

Tools Must Be Fit

Hard Alloy; Cobalt, Chromium, Tungsten; Welded to Wearing Edges; Resists Wear; Withstands Heat; In Tools, Cuts Faster, Lasts Longer

By E. E. LeVan

Making New Atoms in the Laboratory

Many New Forms of Matter are Being Produced by Modern Research in Nuclear Physics, but Science Knows no Way to Transmute Matter Economically

By E. U. Condon

Direct Curent Super-Power

Is High Tension D.C. Transmission Coming Soon? Engineer Discusses Its Advantages, Awaits Only Perfection of Apparatus, Almost Ready


  • 50 Years Ago, December 1938

  • From the Editor

    Our Point of View, December 1938

  • Departments

    Tractor for Comfort, Specialists Should Advise on Hearing Aids, and more

  • Camera Angles, December 193

  • Camera Angles Round Table, December 193

  • Telescoptics, December 193

  • Current Bulletin Briefs, December 193

  • Legal High-Lights, December 1938

  • Index to Volume 159, July-December, 1938

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