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Daylight Saving and the Farmer, The Declining Supply of Motor Fuel and more

The Proposed Vehicular Tunnel Under the Hudson River

A Study in Ventilation

The Work of the French Seaplanes

Disclosure of Excellent Performance of the Naval Service During the War

By Robert W. Neeser

The Monitors of the Present War

A Type of the Fighting Ship That Was Proof Against Torpedo Attack

Reconstruction in Europe--IV

From Fighting Line to Factory

By C. H. Claudy

The Hydrophone for Locating Submarines

An Ingenious French Invention That Did Much to Make the Seas Safe for the Allies

Mechanical Equipment of the Farm

Latest Developments in Agricultural Machinery and Practical Suggestions for the Farmer

By Harry C. Ramsower

High-Pressure Hydrant Regulation

By C. W. Geiger

Recovery of Tin from Tin-Plate Scrap, Toluol and the Gas Industries, and more

Emigration After the War, Shipping Subway Cars a Thousand Miles on Their Own Wheels


  • Departments

    The Heavens in March, 1919

  • Correspondence - March 8, 1919

  • Inventions New and Interesting - March 8, 1919

  • New Books, Etc. - March 8, 1919

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