Volume 121, Issue 6
You are currently logged out. Please sign in to download the issue PDF.
Features
Repairing the Stern-Frame of the "Northern Pacific"
The Largest Marine Weld Ever Made
The Aberdeen Chronograph
An Improved Device for Timing the Flight of a Projectile, Developed by the Army Ordnance Department
Economic Tree Murder
How We Are Denuding Our Forests to Supply Europe While She is Conserving her Own Timber
The Failing Dollar
How Shall We Arrest the Decline of its Purchasing Power?
Our Technical Achievement in the Great War--II
Training a Citizen Army of 2,000,000 Men Intensively in Nine Months' Time
Some Interesting Color Phenomena
A Revolving Apartment
Making One Room Take the Place of a Whole Suite