Volume 130, Issue 2
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Features
The Romance of the Lock
Its Development, and the Means Employed to Beat It, From the Earliest Days
Power from Mercury Vapor
Astonishing Fuel Economy Brought About Through Ingenious Combination of Mercury Vapor and Steam
Our First Rigid Airship the “Shenandoah”
The Design, Construction and Successful Trials of the Great Airship Built by the United States Navy
Our First Rigid Airship the "Shenandoah"
The Design, Construction and Successful Trials of the Great Airship Built by the United States Navy
Our Psychic Investigation Advances
We Find a Medium Whom We Cannot Characterize as a Conscious Fraud
Our Abrams Investigation—V
A Statement of Our Findings to Date and the Prospects of Further Demonstrations and Tests
Our Abrams Investigation—V
A Statement of Our Findings to Date and the Prospects of Further Demonstrations and Tests
How Hafnium Was Discovered
What is Sleep?
A Corkscrew Railway
Remolding Our Civic Clay
How the City Planner Guides the Previously Misdirected Growth of Our Communities
A Motor That Solves the Power-Factor Problem, Making Plants Work Overtime by Means of Electric Light
The Size of the Universe
Animal Sculpture of 25,000 Years Ago
The Recent Discoveries in the Water-Blockaded French Cavern of Montespan
Suspending the Motor Car Body on Air
The Twin Trails Highway
Driving Locomotives with a Charge of Steam
Head-Hunting in Papua
London Fogs
High Explosives that will not Freeze
Cold-Proof Powders that Eliminate the Dangers of Thawing Dynamite
Recent Aeronautic Investigations
Einstein and the Recent Eclipse
Stage Scenery on the Building Block Principle
Exit the Pullman Car Hammock
One Law Versus Forty-Eight
The Practicability and the Necessity of Uniform Motor-Vehicle Legislation in All the States
The Head Hunters of New Guinea
The Heat of the Earth
Apparatus with Which Deep Temperatures Are Determined
Flivvers of the Air That Approach 100 Miles Per Gallon
Lichens—Impossible Plants
Lessons of the Japanese Earthquake
Types of Construction which Survived and Recommendations for Reconstruction A Resumé of Engineering Opinion
Bad Coal Ruins Family Wash
Dog Distemper
Ninety-Eight Tons of Steel in One Piece
Cutting a Traffic Tangle With a $20,000,000 Bridge
The Continuous-Traffic Lift Bridge
A Museum in the Open Air
The Display of Trees and Woody Plants at the Arnold Arboretum
Educating Workmen to Accident Prevention
A Caterpillar Sprocket Wheel With Removable Teeth
Machine for Determining the Psychology of Color
Motor-Driven "Big Wheels"
Gliders
The Pasteurization of Milk
The Blue Ribbon of the Atlantic
Rapid Growth in Size and Speed of Turbine-Driven Ocean Liners
Seeking a Non-Destructive Method for Testing Wire Rope
A Hack-Saw Blade That Improves With Age
Doubling the Field of Vision of the Movies
Truck News From Abroad
With Camera and Chisel
Still Another Form of Photo-Sculpture in Which Simplicity and Efficiency Go Hand in Hand
A Device That Takes Care of Worn Brake Linings and Shoes
Why Watch Springs Break
A Giant Among Airplanes
Sulfur Corrosion
The Story of Steel—II
Missabe—The Greatest Iron Mines and the Most Economical Mining in the World
The Story of Steel--II
Missabe--The Greatest Iron Mines and the Most Economical Mining in the World