Volume 107, Issue 5
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Features
From Clay to Bronze
The Craftsman's Part in the art of Sculpture
A New Form of Underwater Attack
A Torpedo that Carries a Gun
Quirigua--An American Town 1,400 Years Old
Glimpses of an Extinct American Civilization
The Business Aspect of Synthetic Rubber
What are the Prospects of the New Discovery?
The Increasing Temperature of the World
Curiosities of Science and Invention
The Trade-mark as a Business Asset
VI.--Shall My Boy Become an Industrial Chemist?
Purdue University