Among Our Contributors, July 1930

Looking Ahead With the Editor, July 1930

Exploring the Meydum Pyramid Site

Researches in Fog

Flying Clubs for Private Fliers

Results of the Naval Conference

Beautiful Roadsides

Move for Sightly Highways Is Becoming Countrywide

Planet X

Light Counts Cars on Bridge

Water Runs from Marathon to Athens

The Pilot 'Phones His Airport Via Radio

A World in Miniature

The Physical Nature of Death

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

A "Flying" Outboard Motor Boat

Waves and Particles

The New Concept of the Nature of Matter

An Immigrant Plant Proving Ground

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

America's First International Highway

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

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

The Amateur Astronomer, July 1930

A Monthly Department