Volume 129, Issue 4
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Features
A Sunken Boulevard for Automobiles
Protecting Our Great Banks
Armor of Concrete and Steel that Aims to Foil the Scientific Cracksman
Some Curious Comestibles
Amazing Articles of Food that May be Unearthed in Odd Corners of American Cities
With the Men Who Fly-I
Recent Achievements in Practical Aviation, Such as the Coast-to-Coast Flight, Better Engines and Arrangements for Night Flying
Our Abrams Investigation--I.
Some Preliminary Impressions Regarding the Electronic Reactions of Abrams
The Six-Meter International Cup Race
Practical Criminology at Work
Some of the Adventures of the Scientific Modern Detective
Behind the Underwriters' Label
The Gruelling Tests Imposed by the Insurance Man Upon Materials and Appliances
Automobile Race Track on Factory Roof, The Acid Test for the Eight-Wheel Truck
Electric Welder Vs. Riveter
The Past Successes and Future Promises of Electric Welding
A Rudder that Turns Itself, Proof of Einstein's Theory from the Atom
Psychic Adventures on the Continent
Sittings with an Apport Medium in Berlin, and Interviews with Several Notables
A Waterproof Motor for Lifeboats, A Veteran Locomotive
Stucco Investigation
Smashing Dishes to Solve their Secrets
Why Uncle Sam Breaks 6,000 Samples of Plate and Window Glass and More than 2,000 Pieces of China In Novel Tests
A Novel Use for Sugar-Cane Waste, A New Silver Which does not Stain, and more
A Free Balloon Without Top-Valve
Why Armored Suits Fail
Some Facts Worth Knowing Regarding the Perforating Proclivities of Armor-Piercing Bullets
Sunburned Eyes--A Film-Studio Problem, Long-Distance Concerts in Germany
When Water Power Paves the Streets
How the Town of Lawrenceburg Discovered a "Mint" on the Local Creek
House-Moving by Ferry, A Machine for Sowing Seed by Hand and more
Poisonous Plants of the Garden
Danger Which Lurks in the Pretty Flowers and Berries Picked at Random
Slipping Railroad Coaches to Save Time, Use of Kilocycles in Radio and more
The Wembley Park Stadium
Built in London, the Largest Sports Arena to Date, with a Capacity of 125,200 People
A Traveling School for Railway Men, Standardization of Wood Screws
New Cadmium-Gallium Lamp
When Wood Shrinks
What the Camera Has to Report Regarding the Changes Taking Place During Seasoning
Chemistry by Court Order
The Lowest Temperature Yet Reached
The Attack Upon Diabetes
Reaching Upward With Concrete
How the Twelve-Story Limit Set on Concrete Buildings Has Been Discarded by Enterprising Architects
The Fact, the Course, and the Causes of Organic Evolution, Germany Builds New Super Radio Station
Waterproofing Cloth by Electrical and Chemical Action, An Air Washer for the Automobile
A New and Novel Use for Aluminum
Make-Believe Lightning
Investigating Lightning Voltages in the Laboratory to Solve Lightning Arrester Problems
Radio Without Interference
Experiments Proving that Radio Messages May be Sent Successfully on Wave Length of Ten Meters
The Storage of Oil
How 23 Billion Gallons of Crude are Piped, Refined and Distributed to the Consumer
Measuring with Light Waves
How the Various Wave-Lengths are Made to Serve as Scales