Electric Furnaces for Heating Steel—I
Facts and Figures Relating to New and Valuable Methods
Features
The Arrow Rock Dam
Handling Rails Cheaply
Coffee-Growing in Paraguay
Calorizing
A Protective Treatment for Metal
The Resistance to a Ship's Motion
As Determined Experimentally by Means of Models in Special Tanks
What an Incompetent Workmen Costs
Producer Gas from Low Grade Fuels
Cheap Power from Fuels Not Heretofore Considered Economical
Belgium's War Dogs
Red as a Danger Indication
The Value of Various Colors for Signaling Purposes
Ben Franklin Vindicated
The New York Fire Alarm System
Stereoscopic Drawing
A Training for Accurate Workmanship
An Historical Sketch of the Gas Engine
Tracing the Origin and Development of Different Types
