Volume 161, Issue 3
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Features
Eyes that See Through Atoms
The Spectroscope, Long a Master Key in Science, is Proving to be of Major Practical Importance In a Wide Variety of Arts and Industries
Five Companies Present Safety
Superior Safety Glass, Four Times Safety Factor, Five Times Elasticity of Old Product
Bombing Raids Will Find London Prepared
River Models Outwit Nature
Miniatures of Rivers, Harbors, Dam Projects Solve Flood and Flow Problems. Considerable Design Ingenuity Involved in Model Making
No More Blown Patterns
Top Wad in Shot-Gun Shell is the Villain That Causes Them, Elimination of Wad by a New Crimped Shell End, Unimpeded Shot Charge
Up in the Air for a Hobby
Half a Pound of Power, Avocation Makes Big Business, Inexpensive Midget Motors by Mass Production
A Remarkable Triple Star
How the Spectroscope, Working on a Star Whose Secrets the Telescope Does not Reveal, Afords a Striking Abundance of Detailed Facts
What Six Years Did
In the Design of Large X-ray Equipment, Progress Has been Extremely Great in the Past Few Years ... Hospital X-ray equals 90,000,000 Worth of Radium
Why the Earth's Magnetism?
The New Elsasser Theory, Radioactivity Heats Earth's Interior, Heat Sets up Eddies, Currents of Thermoelectricity Flow, Causing Magnetism
The Saluki Everlasting
Carvings Found in Ancient Ruins in the Near East Show That a Breed of Dogs Now Fashionable Among Fanciers was a Favorite there 5000 Years Ago