The Treaty Cruiser--is it Worth While?
High Speed and Heavy Battery Offset By Poor Protection
Volume 135, Issue 5
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Features
Parachute Carries Air Plane to Earth
The Excited States of Atoms
Mars Again Our Neighbor
Recent Photographic and Other Investigations With Instruments Instead of the Human Eye Confirm the Majority of the Conclusions of Lowell Concerning Mars
The Antiquity of Man in America
Who Were the First Americans? Whence Came They?
A Practical Hand-propelled Vehicle of Unique Construction
Reducing Errors in Navy Signaling
A System of Denoting the Letters of the Alphabet by Special Names Has Been Found Highly Effective in Increasing Accuracy
Autumn Styles in Radio
Alternating-current Operated Receivers Are An Outstanding Development
Uncle Sam, Spendthrift--VI
The Destruction of Many of Our Finest Fisheries Has Been Only Less Complete Than the Destruction of Our Forests
Can Welding Replace the Rivet?
Tests That Have Been Made Under Identical Conditions Show That Steel Structures Fabricated With Welded Joints Have Inherent Advantages Over Those Which Are Riveted
Can We Rid City Air of Dust?
Investigations Conducted by the Weather Bureau Indicate that Atmospheric Dust Is an Important Factor in Our Lives. Much Is Being Learned About the Tiny Solid Particles in the Air
The Fossil Bones of Early Man
Man's Life on Earth Has Been Extremely Long. As We Trace It Back His Bodily Form Becomes More Primitive
Latest Lofty Dam in California
Dam, 330 Feet High, Impounds Sufficient Water to Cover 289,000 Acres One Foot Deep
Giant Testing Machine Pulls 2,800,000 Pounds
Classifying the Arthropod
This Sub-division of Animals That Have No Bones Makes an Interesting Subject for the Nature Student
When Reading, Your Eyes Move in Jumps
Tests With Chinese Characters in Vertical and Horizontal Lines Disclose Some Remarkable Facts About the Movements of the Eyeball
The Romantic Quest of the Iridescent Pearl
A Power Plant Greater than Niagara or Muscle Shoals
How Death Deals its Cards
Death in a Thousand Shapes Is Knocking Eternally at Everyman's Door