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Among Our Contributors, May 1930

By Clarence M. Young

Looking Ahead With the Editor, May 1930

Is There an Ether?

What is a Good Flying School?

The Department of Commerce Has Worked Out Regulations for Rating Aviation Schools and Has Approved Many

By Clarence M. Young

Revising Our Air and Our Water

A Piece of Research in Pure Science Provides an Unexpected By-product, Giving Atmospheric Oxygen an Isotope

By Henry Norris Russell

When You Buy Your Plane

What Details of Construction, Features of Operation, and Factors of Safety to Consider

By Lieutenant (J.G.) H. B. Miller

Florida's Lusty Infant Industry

Tree Producing Invaluable Tung Oil Now Naturalized American

Voices Across the Sea

The Successful Exchange of International Programs Places Another Milestone on the Path of Radio Progress

An Air-transport Operator Speaks

"It Is the Operator's Obligation to Employ Every Known Device to Make Air Transport Safe and Speedy"

By P. G. Johnson

Blasting Coal Without Explosives

Inert--Flameless and Non-inflammable--Carbon Dioxide in New Shell Blasts Coal With a "Slow" Heave

By Frank H. Kneeland

The Cultured Naval Officer

Few People Realize the Broadness and Completeness, Technically and Culturally, of Our Naval Education System

By W. D. Puleston

Canada's Peerless Playground

The Successful Airplane Diesel

First Detailed Description to be Published of the Design of This Revolutionary Engine

Advice to Students of Aviation

By H. J. Cooper

Stunting for Safety

Training in Plane Acrobatics Instills Confidence and May Help the Pilot Out of Tight Places

By Lieutenant (J.G.) H. B. Miller

Midget Marine Motors

The Rise of the Outboards Has Been Rapid, But Even Greater Developments May Be in Store

By Thomas W. Farnsworth


An Appreciation of America's Foremost Optical Physicist

By William H. Crew

The Aerial Ferry Arrives

Operating at Frequent Intervals, Amphibions Carry Passengers on Regular Schedule

Our Air Analyzed

How Science Fights the Smoke and Dust Evils of Our Cities

A Diesel Drives an Automobile

Stock Marine Diesel in 6000-pound Car Chassis Makes 2780 Miles on $7.72 Worth of Fuel Oil

By William F. Sturm

Edison's Rubber

What Mr. Edison Is Doing in His Attempt to Develop an American Wartime, Emergency Rubber Industry in the South

By G. H. Dacy

"How do they Know?"

A Brief Glimpse of Some of the "Inside" Considerations Which Guide the Expert in Judging the Antiquity of Flint Implements

By J. Reid Moir

The Amateur Astronomer, May 1930


  • Departments

    Walter Franklin Prince

  • Admiral Byrd's Antarctic Expedition--Its Accomplishments

  • Our Point of View, May 1930

  • A Mail Order Airplane, Air Commerce in 1930 and more

  • Hudson River Bridge Approach, German Locomotive has 1700-Pound Pressure and more

  • "Parrot Disease", Cancer and more

  • Spray Drying of Latex Revolutionizes Rubber Manufacture, Roast Beef in a Salt Shaker and more

  • Current Bulletin Briefs, May 1930

  • The Heavens in May 1930

  • Chemicals do not Fool Chickens

  • American Corporations in Mexico, Patents and Taxes and more

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