
Putting Waste Metals to Work
Methods and Machines That Make It Profitable for Every Plant to Handle Its Own Junk

Putting Waste Metals to Work
Methods and Machines That Make It Profitable for Every Plant to Handle Its Own Junk

Keeping Our Railroads Up to the Mark
Pneumatic Apparatus That Constitutes the Prime Factor in Trunk-Line Maintenance of Way

Machine-Made Window Glass
How the Great Sheets of This Difficult Material Are Made and Handled

American Lignite Coals
Canada Blazes the Way to Put Them on a Par with Anthracite

Germany's Brown Coal
How Teuton Chemists Have Converted the Lowly Swamp Muck Into an Industrial Cinderella

Rails and Railroads
Some Facts and Figures of the Annual Traffic in New and Old Steel Rails

Making the Most of Niagara
Projects Looking to the better Utilization of This Great Water Power

Canada's Superpower Zone
What Ontario Has Done in Hydroelectric Development

Air Plus Oil Equals More Oil
How Compressed Air Takes the Place of Natural Gas in Stimulating the Flow of Old Wells

Shipping Coal by Wire
The Springdale Undertaking--A Great Power House at the Mine Mouth

Every Automobile its Own Elevator

Asbestos in Architecture
The Growing Importance Played by this Fibrous Substance in Modern Building

Something Different in Salvaging Operations
Relieving a Wreck of its Cargo with the Aid of Injections of Compressed Air

The Problems of Electrification
The Struggle Toward a Standard, and What Is Likely to Come of It

Extracting Oil by Electrolytic Action
A Recently Developed Process Which Bids Fair To Be of Economic Moment

Concrete and the Building Crisis
Some of the Advantages Which Have Led to Wide Adoption of This Structural Type

Shall the Corn Fields Run Our Cars?
The Possibilities of Synthetic Fuels, and the Source of the Alcohol to Make Them

Reducing Trade Routes with Submarine Freighters
How a Special Type of Submarine Might Be Employed for Traversing the Arctic Ice Fields

Our Deep-Sea Freighters
Something of Permanent Advantage that We Got from Our Participation in the War

Going to Sea in a Tank
Self-Propelled Models That Make for Better Ships and Less Fuel Consumption

Duluth to Liverpool in One Bottom
The Arguments Advanced in Favor of a Deep-Water Route Between the Great Lakes and the Sea

Pooling Our Power
Economic Possibilities of the Super-Power Plan

Piercing the Catskills for Water
Some Constructional Details of the 18-Mile Tunnel Under the Shandaken Mountains

The World's Greatest Vehicular Tunnel
Some Constructional Features of the New York-New Jersey Project