
Ball Bearings and how they are Made
The Tiny but Perfect Spheres that Keep Down the Friction Toll in Modern Machinery

Ball Bearings and how they are Made
The Tiny but Perfect Spheres that Keep Down the Friction Toll in Modern Machinery

Immunizing Cabbage by Natural Selection
How Nature's Standard Biological Process Is Adopted and Speeded Up by Man

A Key to Many Industries
The New Technique of Die-Cutting, and the Place It Holds in Our Factories

The "Lusitania" and the Submarine Salvor
Some of the Schemes Proposed for Dealing with the War's Most Famous Wreck

Eliminating Three Miles of Grade Crossings
How the Lackawanna Railroad Is Recasting Its Line Through Newark and the Oranges

Fire at Sea
Means of Minimizing an Ocean Peril of Increasing Prevalence

When the Hand on the Throttle Fails
The Construction and Operation of the Webb Automatic Train-Stop System

Our Wasteful Industries
Six Major Manufacturing Groups That Make a Bad Showing as Regards Operating Efficiency

A Ship Without a Bottom
How the "F. D. Asche" Was Towed from Florida to New York with Only a Blanket of Compressed Air to Keep the Sea Out of Her Gaping Hull

Curbing the Colorado
Flood Control, Irrigation, and Power Generation All In One Gigantic Construction

Research Settles the Problem of Tunnel Ventilation
The Best System for Supplying Fresh Air to the Hudson River Vehicular Tunnel Tube Is Determined

America's Fuel Resources
What We Have and How We Are Using Them

America's Domestic Food Supply
In which we take Inventory of our needs and how far they are Supplied by Home Production

A Climax in Concrete Construction
Erecting An Eighteen Story Reinforced Concrete Building at a Lower Cost Than a Structural Steel Type

Grouping Our Power Plants
The Superpower Survey's Impressive Figures, Which Afford Plenty of Food for Thought

The Hudson River Caissons
Giant Shafts from Which the Vehicular Tunnel Will be Built and Later Ventilated

Painting with Metal Spray
How Protective Coatings are Shot into Place Under the Latest Procedure

Starving in the Midst of Plenty
Present Knowledge Regarding the Cause and Cure of Pellagra

Getting the Rest of the Oil
Laboratory Tests that Reveal the Underground Secrets of the Petroleum Field

The Radio Compass and Navigation, The Bombing Tests and our Naval Policy and more

Reporting the Life Story of Rails
How Railroads Employ the Rail-Section Machine for Determining the Wear and Tear on Their Tracks

Something New in Ferries

The Condensing of Milk
How It Is Carried Out and Its Economic and Vital Importance to the Country

Facts About Concrete
How We Are Expanding Our Knowledge of the Behavior of Cements and Aggregates