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Why Are Lunar Eclipses Visible?, Alcohol presents a Substitute for Acetylene and more

What the War Taught Us About Motor Trucks

How Design and Construction Pared in the Gruelling Test of War Service

By Victor W. Pagé

The Draft-Horse Situation

How the Gasoline Tractor and the Motor Vehicle Have Affected Our Equine Statistics

Americas Automobile Industry

Some Facts and Figures Which Indicate Its Magnitude

The High Price of Milk

Some of the Causes, and the Remedy

By Alfred J. Lotka

The Gasoline Locomotive of the Highways

Special Truck Models for Use as Road Tractors With Semi-Trailers

By Harry Wilkin Perry

Plowing Deeper and Deeper

The Gasoline Tractor and the Science of Sub-Soiling

By H. A. Crafts


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