Volume 117, Issue 23
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Features
Science- December 8, 1917
Astronomy- December 8, 1917
Engineering- December 8, 1917
The Submarine Problem--XX (Conclusion)
Past Results and the Promise of the Future
The Mathematics of Winning the War
Why We Should Make the Greatest Possible Initial Effort
Co-operation
When Will the Allies Learn the Formula Used So Successfully by the Teuton ?
By an Italian Military Expert
From the Camera to the Screen
How Motion-Picture Films are Developed, Printed, Titled, Tinted, Dried and Polished
Trans-Atlantic Airships
Advanced Ideas for Dirigibles Based on What the Germans Have Done
By Alexandre Livventaal, Late Consulting Engineer to Count Ferdinand von Zeppelin