Features
On River and Canal
What the Government Is Doing to Bring These Waterways to the Level of Use Maintained by the Lakes
The Romance of Invention--VIII
The One-Man Machine Gun and Its Inventor
The Exploring Rocket
The Missile That Could Be Shot to the Moon, and Its True Purpose
Airplanes That Are Different
How the European Constructors Are Striking Out Along New Lines
From Coal Barge to Bunker
A Digging and Elevating Outfit of Interesting Design and Great Adaptability
Eliminating the Lost Call
How a Simple Telephonic Novelty Cuts Out a Vast Amount of Lost Motion in Office and Factory
Putting Flax on a Modern Basis
How an Industry That Has Always Been Conducted by Hand is Feeling the Touch of the Mechanical Engineer
The Double Fovea in Birds of Prey, Restoring Stained Glass Windows
Departments
- Departments
Correspondence - February 14, 1920
Inventions New and Interesting - February 14, 1920
Recently Patented Inventions - February 14, 1920
