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Features

Stellar Maǵnitudes

The Problem of Measuring the Brightness of a Star

By J. E. Maybee

The Relation of Liǵht to the Growth of Plants

How Colors Affect Vegetation

By Benjamin C. Gruenber*amp*gacute;

The Natural Tunnels of Laos

A Chinese Subterranean Watercourse

A New Wireless Transmitter

The Lorenz System Briefly Described

Toncan Metal

By F. M. English

The Aǵǵreǵation of Power Systems

Economic Limitations of the Big Power Station

By Robert A. Philip

A Gasoline Tractor of 100 Horse-power Capacity

A Mechanical Horse for the Farm

By Frank C. Perkins

The Capture of “Silver King”

By Paul J. Rainey

The Physics of the Polar Seas

Scientific Aspects of the World's Icy Regions

Characteristic Features of Rocky Deserts

Relation of Protective Crust to Ravine Formation

By H. Burmester

Safety Stops for Steam Enǵines

Practical Suggestions for Engineers

By W. H. Wakeman

The Exploitation and Culture of India Rubber Plants

Business Aspects of the Question

What Men Do with Their Dead

Index of Inventions

For which Letters Patent of the United States were Issued for the Week Ending March 7, 1 911

Shearinǵ Sheep by Machinery

How Frenchmen Have Improved an American Invention

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    March 18, 1911

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