Quantitative Colorimetric Analysis—I
Its Theory, Laboratory Methods and Apparatus
Features
Conserving Flood Waters in Texas
Increasing the Irrigated Area of Our Biggest State
Swaging Machine with Semi-Automatic Holder
Designed for Accuracy and Economic Working
The Need of a Traffic Census
Its Importance in the Determination of a Highway Policy
Radio-Elements as Indicators in Chemistry and Physics
The “Fossil Forest” of Arizona
Where the American Tourist Should Find Much to Interest Him
Cab Signals on Locomotives
High-Speed Rotary Machines
Leblanc's Researches and Inventions
German War Aeroplanes, A New Soap Material
Improvised Mine Fires on an Experimental Scale
An underground Fire Chamber for Experiments on Spontaneous Combustion and Mine Fires
Use of Waste Sawdust
Fiords and Other Inlets of the Sea
To What Agencies Do They Owe Their Origin?
Coke Oven Gas for Lighting
The Career of the Mining Engineer
His Schooling in Theory and Practice
Correspondence
Baur's Silver Carbon Combustion Cell, Transparency of Leaves to Ultra-Violet Rays and more
Construction of a 45-Ampere-Hour Storage Battery
A Lead Accumulator of Simple and Durable Build