Volume 120, Issue 19
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Features
A Neglected Port, A Year of the Carnegie Institution and more
The Tank Man's Story
As Told to C. H. Claudy, Special Correspondent of the Scientific American in France
Fossil Deposits of Nebraska
What Geology Tells Us of the Prehistoric Fauna of the Plains
Free as Air
Legislation Needed to Control Aerial Traffic By Our Washington Correspondent
Shale Oil as a Business Proposition
A Timely Word of Caution as to Processes, Costs and Profits
Our Marked Highways
How Their Marks Have Led and Misled the Innocent Tourist
The Seagull Flies
Special Factors in Connection with Naval Aviation
Mechanical Equipment of the Farm
Latest Developments in Agricultural Machinery and Practical Suggestions for the Farmer