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Relative Efficiency of Bridge and Tunnels, The International Institute of Agriculture and more

The North Sea Mine Barrage—I

Closing the North Sea With a Wall of Mines, 230 Miles Long by 25. Wide--The Preparatory Work

By Reginald R. Belknap

Industrial Democracy and Engineering

Some Lessons That Have Come Out of the War

By Irving A. Berndt

Ticks as Carriers of Animal Disease

Inferences Drawn from the Destruction of 500 Reptiles at the New York Zoological Garden During Several Years

By W. H. Ballou

Railway Terminal Problem at the Port of New York

Plan for Bringing Manhattan Island Into Close Connection with the Railroad System of the United States

World Markets for American Manufactures

A department devoted to the extension of American trade in foreign lands.

By Lynn W. Meekins

Future of British Flying

What the British Government Is Doing in Preparation of the Coming Civilian Aviation

By C. H. Claudy

Electric Light and Egg Production, Steel-Grip Gloves


  • Departments

    The Service of the Chemist

  • Correspondence - March 15, 1919

  • The Motor-Driven Commercial Vehicle

  • New Books, Etc. - March 15, 1919

  • Notes and Queries - March 15, 1919

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