The Cannon Falls Hydro-Electric Development
Designed for an Ultimate Capacity of Three Thousand Horsepower
Features
The Psycholoǵy of Liǵht—II
The Subjective Aspect of Optics
New Method of Testinǵ Rails
A Simple Impact Trial
The Power Required to Cut Steel
The Influence of Chemical Composition and Previous History
Developinǵ a small Water Power Plant
Electric Power for the Farm and Country House
Cheddar Cheese Making
A Phase of Dairy Industry
Skis; Their Construction and Use
The Making of a Good Ski is a Delicate Task
The Sewer System of Havana
How the United States Have Fulfilled Their Responsibility
Wheels, Ancient and Modern and their Manufacture—I
From Tree-trunK Roller to Wire-spoke Motor Car Wheel
Condiments and Stimulants
They Represent Lubricants,Not Motive Power
