Submarines Betrayed by Sound Waves
Detecting the Presence of Underwater Craft Fifty-five Miles Away by Microphonic Devices
Features
Salvage of the Submarine F-4
How the Vessel Was Recovered from a Depth of 300 Feet
Strategic Moves of the War, October 7th, 1915
The Largest Arch Bridge in the World
Direct Rail Connection Between New England and the South and West
Stretcher Hammock and Stretcher Chair
Invented by the Comtesse de Chaumont Quitry
Completion of Arrowrock Dam
The Highest Dam in the World
Notes for Inventors - October 16, 1915
Departments
- Letters
Correspondence - October 16, 1915
- Departments
The Motor-driven Commercial Vehicle - October 16, 1915
Recently Patented Inventions - October 16, 1915
