Volume 106, Issue 20
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Features
Coast-Defenses of the United States
The System of Range-Finding by Which the Great Accuracy of Coast-Defense Gun-Fire is Secured
Guns of the Coast-Defense
The Weapons Which Guard Our Roadsteads and Harbors
Gun Versus Armor
How the Gun Won the Contest Between Projectile and Armor-Plate
Coast-Defense by Submarine Mines
The Most Speedily Prepared, the Most Deadly, and the Most Dreaded Form or Coast-Defense
The New Eiffel Aerodynamic Laboratory at Auteuil
Description of the Plant, With Results Obtained in Eiffel's Experiments
Wireless Weather Reports from the Atlantic
The Automobile as a Portable Source of Power
Auxiliary Uses for the Motor Vehicle Engine
A New Safe that Resists the Blowpipe
What Inventors are Doing - May 18, 1912
Simple Patent Law; Patent Office News; Inventions New and Interesting