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Among Our Contributors, July 1930

By M. R. Harrington

Looking Ahead With the Editor, July 1930

Exploring the Meydum Pyramid Site

By Cornelia H. Dam

Researches in Fog

Flying Clubs for Private Fliers

By Charles L. Lawrance

Results of the Naval Conference

Beautiful Roadsides

Move for Sightly Highways Is Becoming Countrywide

By Walter E. Burton

Planet X

By Henry Norris Russell

Light Counts Cars on Bridge

Water Runs from Marathon to Athens

By F. D. McHugh

The Pilot 'Phones His Airport Via Radio

By Harold Crary

A World in Miniature

The Physical Nature of Death

By Amy F. Rowland, George W. Crile and Marie Telkes

Shipping Newsprint Paper in Safety

The Mystery of Gypsum Cave

Discoveries Near Boulder Dam Point Either to High Antiquity for Man in America, or to a Later Survival of Certain Extinct Animals Than Heretofore Has Been Believed

By M. R. Harrington

A "Flying" Outboard Motor Boat

Waves and Particles

The New Concept of the Nature of Matter

By George P. Thomson

An Immigrant Plant Proving Ground

By Charles W. Geiger

A Clearing House for Inventions

America's Cradle of Natural Science

A Curious Industry Owned by a University to Supply the Needs of Colleges

Chicago Gets a New Jail

By Albert A. Hopkins

America's First International Highway

Pre-Incan Aborigines Engineered a "Modern" Highway 4000 Miles Through the South American Andes

By A. Hyatt Verrill

The Difference Between Tweedle-Dum and Tweedle-Dee

The Majority of the Discoveries of Practical Value to the World Have Been the Result of the Scientist's Penchant for Prying Into "Little Things" of Apparent Unimportance

By F. K. Richtmyer

The Amateur Astronomer, July 1930

A Monthly Department


  • Departments

    Back of Frontispiece, July 1930

  • Clearing the Interior of a Pyramid

  • Our Point of View, July 1930

  • Direct-Reading Light Intensity Meter, Fireproof Houses in France and more

  • Current Bulletin Briefs, July 1930

  • Secrecy of War-Time Inventions, Standardized Bottles and more

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