A Continuous Unloader at Work
On the Western Pacific Railroad, California
Features
The Effect of Tobacco Smoke on Plants
All Vegetable Organisms, from Green Plant to Bacillus are Affected
Precaution in making Litharge-Glycerine Cement
Utilization of Dead Pine Wood in the South
The Recovery of Turpentine from Logs and Stumps
Problems in Telephone Traffic Enǵineerinǵ—I
Some of the Difficulties that Arise in Serving a Heterogeneous Territory
A Model Geyser
The Gyro Compass
Its Principle and Construction
The Great Star Map—IV
Star Positions
The Hot Air Balloon of the Twentieth Century
The Revival of the Montgolfier
International Lanǵuaǵe and Patents
Loaded Telephone Cables
Their Function in Preserving the Wave Form of the Original Message
A German View of our Panama canal Worries
The Power of Niaǵara Falls
Taking Stock of the Energy Utilized
