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Glaciers and International Boundaries

How One Nation Gained Hundreds of Square Miles of Territory

By Lawrence Martin

Installation and Care of Storage Batteries

Their Efficient Operation Depends on Proper Charging and other Factors

By H. M. Nichols

Electric versus Gas Lighting for Motorcycles

Gain in Illumination, Reliability, Light Weight, and other Factors

By L. C. Porter

Artificial Daylight for Color Matching

The Requisite Components of Light Sorted Out by Means of Light Filters

By Robert French Pierce

The Earth's Poles

The Vogue of Special Steels

The Hempstead to Washington Flight

Some Aspects of the Subject of Transportation

I—Traffic by Land

By J. E. Kuhn

The Steam Yacht “Winchester”: A Thirty-Two-Knot Craft

Blood Parasites

Elusive Foes of Mankind

By H. G. Plimmer

German Silver

By A. A. Somerville

New Books, Etc.


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