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Features

Insects that Carry Disease

By Charles Dury

An Aviation Map of the World and Marks for Aviators

Based on the International World Map

Powerful Articulated Narrow Gage Locomotives for Tasmania

Power from Waste Heat

Hardening Soft Iron

Continuity—I

The Atomistic Trend of Modern Research, and a Plea for Conservatism

By Oliver Lodge

“Dreadnought” Floating Dock for the British Battleships

The Difference Between the “Box Dock” and Docks of the “Self-Docking Type”

By Frederick C. Coleman

Practical Operation of Gas Engines using Blast-Furnace Gas

Purification of the Fuel Gas, and Other Important Factors

By Charles C. Sampson

Progress in Egyptian Exploration

Important Disclosures are Expected in the Near Future

By M. N. Buckman

Art in Natural History

A Striking Elephant Group at the American Museum of Natural History

Noise and Factory Efficiency

Heat and Energy Expended by the Human Motor

Lenard' s Researches on Phosphorescence

The Phenomenon Probably Due to the Photoelectric Action of Light on Atoms of the Active Constituents

By E. N. Da C. Andrade

The Presence of Boron in Milk and in Eggs

The Subterraneous Waters of Egypt

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    September 20, 1913

    Think Outside the Gift Box