Volume 143, Issue 3
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Features
Volcanology
What Is Being Done to Make the Observation of the Earth's Internal Fluids an Experimental Science
Why Stars Twinkle
The America's Cup Defenders
Crash-Testing Tires at High Speed
Our Patent System
The Use and Abuse of Patent Rights
More About the Peking Man
Arcs of Art
The Camera Analyzes the Electric Arc
The Pattern of Evolution
A Criticism of Doctor Austin Clark's Thesist
Modern Rehabilitation of the Cripple
Basic Patents in Evolution--II
A Fish Factory at Sea
Racing Cars of 1930
Mooring Dirigibles Mechanically
New Stub Mast and Other Equipment at Lakehurst Facilitate Mooring and Housing