Scientific American Magazine

November 1930

Volume 143, Issue 5

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Features

The Tree Bark of a Hundred Uses

Burton Davis

Radio Charts the Upper Air

Published by permission of Major General George S. Gibbs, Chief Signal Officer, United States Army.

Jerome D. Van Brakle

A Gallon of 'Gas' from a Gallon of Oil

Henry W. Hough

The Stage Goes "Air-Minded"

Earthquakes

G. Austin Schroter

Railroad Electrification

Francis H. Shepard

Another Peking Skull Discovered

G. Elliot Smith

How Pluto's Orbit was Figured Out

Henry Norris Russell

Television Needs New Ideas--and Less Ballyhoo

A. Dinsdale

Glass Tubing By The Mile

How Many Minutes of Play in the Average Football Game?

Hugo L. Rusch

The Story of Glozel--a Chapter in Credulity

David Riesman

By-Products from Industrial Wastes

Ernest W. Steel

The Young Giant: Natural Gas Fuel

The Sick May Ride in Pullmans

The Technician Talks About the Talkies

Raymond Francis Yates

Birds Have Natural Slotted Wings

Ray P. Holland Jr.