Detecting Poisonous Gases by their Action upon small Animals
Experiments Carried Out by the Bureau of Mines
Features
The Limiting Size of Steam Turbine Units
In Land Practise the Limit is Fixed by Difficulties of Transportation
Did the Horse Exist in America before this Continent was Discovered by Europeans?
Was Discovered By Europeans?
Hydro-Electric Power for a Southern Industrial Center
A Nine Million Dollar Plant for Chattanooga
The Value of Science
The Glow of Sulphur
Indian Corn in the Far East
The Hughes Gold Medal of the Royal Society of London
Award to Dr. Alexander Graham Bell
Report on Investigation of Grinding Wheel Protection Devices
Hoods and Flanges
Tracing through Opaque Paper
Dynamo-Electric Lighting for Automobiles
Automatic Control of Output at Varying Speeds of Machine
American-Grown Bulbs
Encouraging a Home Industry
The Ignition of Wood
New Automatic Fire Alarm
The Instrument Depends on the Use of a Conductor Having a Negative Temperature Coefficient of Resistance
Reflections on Aerial Flight
With a Note on the Fallacy of Pendulum Stabilizers
