Features
An Integrating Opacimeter for Stellar Photography
Cathode Rays from Incandescent Lamps, New Kerosene Vaporizer Demonstrated and more
By Our Berlin Correspondent
The Prototype of the Yale Lock
Comparison of French and German Strength in Dirigible Airships
Why Germany is the Leading Air Power
The Japanese Battle-cruiser "Kongo"
The Most Powerful Armored Cruiser Afloat
John Milne, The Death of S. F. Cody, and more
Departments
- Letters
Correspondence - August 16, 1913
- Departments
Inventions New and Interesting
Recently Patented Inventions - August 16, 1913
Notes and Queries - August 16, 1913
