
Space & PhysicsApril 4, 1914
A New Theory of Sunspots

A New Theory of Sunspots

Wireless Time
An Interesting Experiment Made at Beloit College

The Great Tower Telescope of the Mt. Wilson Solar Observatory
A Description of the World' s Largest Reflector

The Mount Wilson Solar Observatory
Studying the Heavens With the Most Elaborate Equipment in the World

The Sixty-Inch Reflector of the Mount Wilson Solar Observatory