Volume 120, Issue 11
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Features
The North Sea Mine Barrage—I
Closing the North Sea With a Wall of Mines, 230 Miles Long by 25. Wide--The Preparatory Work
Industrial Democracy and Engineering
Some Lessons That Have Come Out of the War
Ticks as Carriers of Animal Disease
Inferences Drawn from the Destruction of 500 Reptiles at the New York Zoological Garden During Several Years
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.
Future of British Flying
What the British Government Is Doing in Preparation of the Coming Civilian Aviation