Volume 76, Issue 1968supp
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Features
An Aviation Map of the World and Marks for Aviators
Based on the International World Map
Power from Waste Heat
Powerful Articulated Narrow Gage Locomotives for Tasmania
Hardening Soft Iron
Continuity—I
The Atomistic Trend of Modern Research, and a Plea for Conservatism
“Dreadnought” Floating Dock for the British Battleships
The Difference Between the “Box Dock” and Docks of the “Self-Docking Type”
Practical Operation of Gas Engines using Blast-Furnace Gas
Purification of the Fuel Gas, and Other Important Factors
Progress in Egyptian Exploration
Important Disclosures are Expected in the Near Future
Heat and Energy Expended by the Human Motor
Noise and Factory Efficiency
Art in Natural History
A Striking Elephant Group at the American Museum of Natural History
Lenard' s Researches on Phosphorescence
The Phenomenon Probably Due to the Photoelectric Action of Light on Atoms of the Active Constituents