A Chemical Loafer, and How it was Put to Work
Argon, the Laziest of All the Elements, Plays a Big Role in the Latest Incandescent Lamps
Pedigreed Chicks, A New Form of Vibration Galvanometer
Digging and Loading in One Motion
Mining Coal with a Dredge
Turning the Wheels of a Century Hence--III
What the United States Must Do to Forestall the Day When Fuel Goes Beyond the Common Reach
Fighting Waves with Compressed Air
An Artificial Reef of Air That Breaks Up the Rollers and Makes Them Harmless
What About Our Forests?
How Long Shall We Be Able to Cut Them Down Four Times as Fast as They Grow?
"Resolute" Defends the Cup
Why "Resolute" Was Chosen and Her Prospects of Defeating "Shamrock IV"
The Man Behind Our Daily Bread
Grading and Testing Grain for Sale on the Grain Exchanges of the Country
Preventing the Oxidation of Metals from Heat, Ball Bearings in Steamship Engines, Invention in Flashlight Photography
Correspondence - July 17, 1920
The Motor-Driven Commercial Vehicle
Recently Patented Inventions - July 17, 1920