The Thury System of Direct Current Transmission
Special Conditions that Make its Adoption Desirable
Features
Lowering Heat Losses
Marine Mines
Their Purpose: how they are Planted and how Destroyed
Cooling Electric Generators
World's Production of Borax
Zehnder's Safety Roentgen-Tube
How French Hospital Trains Help to save the Wounded
A New and Important Factor in Railroading
On the Structure of the Universe—II
The Ultimate Object of Stellar Astronomy Concluded from Scientific American Supplement No. 2084, Page 370, December 11, 1915
The Tragedy of Tarawera
A Volcanic Eruption that Destroyed Many Natural Beauties
The Critical Temperature of Mercury
Fusible Boiler Plugs
Spreading a Smoke Curtain
An Artifice of Marine Warfare
Strength of Paper
The Diesel Engine
A Survey of it's Evolution as Applied to Marine Purposes
Micro-Weighing
Percussive Electric Welding
Process and Machines for Uniting Similar or Dissimilar Metals
A Substitute for Platinum-Iridium Alloy
The Conditions of Industrial Accidents
How to Increase Steam Production
What Wider Knowledge and Better Design has Accomplished
The Density of Oxygen
A New Method of Surface Hardening
Departments
- Letters
Correspondence - December 18, 1915
