Scientific American Magazine

June 1934

Volume 150, Issue 6

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Features

The Scientist in an Unscientific Society

Henry A. Wallace

A Flying Hotel

Double the Size of the Graf Zeppelin, the LZ 129 Will Provide Many Passenger Comforts

Wolfgang Lambrecht

Airmail

American Air Transport Operators Have Built Up the Finest System of Its Kind in the World. "They Can Do Even Better if They Do Not Have to Play With Loaded Dice."

Reginald M. Cleveland

Race Betterment by Human Sterilization

J. H. Landman

Fading Belief in Life on Other Planets

Henry Norris Russell

Modernizing the U.S.S. 'Mississippi'

W. D. Puleston

Objectives in Amateur Photography

Nitrogen Fixation and the Future

Chaplin Tyler

The Amateur and his Microscope--XI Photographing Specimens

John F. Brand T, John V. Butterfield

Full-Size Coal Mine in a Museum

Around the World with Short-Wave Radio

Louis Martin