Comparison between Torpedo Boat and Merchant Marine Engines

Liquid Fuel for Naval and Marine Uses

Armored Concrete.—V

The de Forest Syntonic System of Wireless Telegraphy

Contemporary Electrical Science

A Gasoline-Motor-Propelled Roller

By the English Correspondent of Scientific American

The Aladdin Cooker

The Influence of Light on Plant Development

Transportation Routes and Systems of the World

A Proposed Solution of the Problem of Flight

Insects as Carriers of Disease

New uses of Peat and Forest Products in Germany

Oyster Culture in Japan

The Preservation of Maize during Transport by the Clayton Process

Genesis of the Diamond

Engineering Notes

Science Notes

Electrical Notes

Trade Notes and Formulæ