Features
More Information for the House Committee, Flying Around the World and more
Curing Noise in a Concrete Building
The German Observatory in Spitzbergen, Watching the World Revolve
Hitting the Bull's Eye at Six Miles
Target Practice in the United States Navy
Eliminating the Flicker From the Moving Picture
A New System of Motion Picture Projection
Where and How Radium is Obtained
The American Supply of the Most Precious Substance in the World
Platinum Deposits, Beet Sugar Industry in Great Britain
Departments
- Letters
Correspondence- February 14, 1914
- Departments
Inventions New and Interesting- February 14, 1914