Volume 56, Issue 1448supp
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Features
Mining and Manufacture of Rock-Salt
The North Sea Fisheries
The Apprenticeship System
Improved Machinery for Wheel Making
The Fuels Competition of the Automobile Club of France
A New Form of Friction Clutch
The Summer Meeting of the Iron and Steel Institute
The Modern Craft of Metal Working
Correspondence
Radio-Activity—the Secret of Radium's Light and Heat
A Correction
The Influence of Brain-Power on History
Sir Norman Lockyeh'S Presidential Address to the British Association