Volume 107, Issue 13
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Features
New Methods of Measuring Clouds
The Work of Besson at Montsouris Observatory
How to Make an Ultra-violet Ray Objective
The World's Production of Gold
The Nature and Origin of Life
Prof. Schaefer's Inaugural Address of the British Association
Professor Dr. Paul Walden, A 10,000-ton Motor-driven Ship
The Discovery of a New People
Stefansson's Blond Eskimo of Victoria Land
Farm Electric Lighting by Wind Power
A Complete Lighting Plant Installed for $250