A Gasoline Caterpillar Traction Engine
Carrying Water Across the Mojave Desert
Features
Continuous Colored Flames
What a Skyscraper Contains
Revising the Russian Calendar
Dropping Projectiles from Balloons
The Military Possibilities of the Dirigible Airship
Present and Proposed Methods of Measuring the Efficiency of Aeroplane Propellers
An Archæological Fraud
The Rotaplane
An Ingenious Astronomical Demonstration Apparatus
Oil and Ammonia from Sewage
Recent Developments in Galvanizing
“Sherardizing,” the Dry Galvanizing Process of Cowper-Coles
The Aniline Dyes
Their Application to Every-Day Fibers for Home Dyeing
Water-Tight Closing Arrangement for Steam-Vat Bottoms
Fenders and Wheelguards
The Internally-Fired Helical Furnace
Wholesale Annealing and Hardening Done Almost Automatically
Earthquake Forecasts.—II
Future Possibilities
Uranium Mining
How Radium is Obtained from the Ore
The Dynamics of Life
The a Chievements of the Scientific Franftenstein
The Warfare of the Future
The Probable Development of the Explosive and the Projectile
