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The Future of Oil Fuel

Depends on Increase of Output and Mode of Employment

By Boverton Redwood

The Rôle of Fluorine in Animals

The New Havel Bridge, Berlin

Opening Up the Territory Across the Havel for the Expansion of the German Capital

By C. Van Langendonck

Preventing the Waste of Oil and Gas from Flowing Wells

Work of the Vienna Radium Institute

Selecting a Prime Mover

Reciprocating Engine, Turbine, and Gas Motor Compared

By H. E. Longwell

West Coast Trade Expectations at Panama

By Wills Fletcher Johnson

Inventing Machines to Make Inventions Marketable

Some Interesting Facts About Inventions and a Few Points That the Inventor Usually Overlooks

By E. R. Miner

Comparative Strengths of Naval Powers

The Marconi Wireless Suit

The History of Wireless Telegraphy as the Patent Lawyer Sees It

Material in Crat-Iron Flywheels and Pulleys

European Induced Draft Installations

Constancy and Ready Control the Advantages Over Natural Draft

By Frank C. Perkins

Pyrometer for Superheater Locomotives

Quantitative Colorimetric Analysis—III

Its Theory, Laboratory Methods and Apparatus

By G. A. Shook

Laying up Heating Boilers


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