Volume 121, Issue 9
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Features
Completion of the Pearl Harbor Dry Dock
Peculiar Geological Conditions and How They Were Mastered by an Ingenious Method of Construction
When the Compass Goes Crazy
The Peculiar Conditions of Flying Which Make the Needle Misbehave
The James Watt Centenary
One-Hundredth Anniversary of the Man Who Made the Steam Engine What It Is
Our Technical Achievements in the Great War--V
Providing the Equipment and Training the Forces for a Great Flying Force