
Canalization of the Upper Mississippi River
Trunk-line Water Route From "Twin Cities" to New Orleans, 27 Dams With Locks Required, Cost 124,000,000 Dollars, Economic Gains

Canalization of the Upper Mississippi River
Trunk-line Water Route From "Twin Cities" to New Orleans, 27 Dams With Locks Required, Cost 124,000,000 Dollars, Economic Gains

The Paper of the Future
Means, Ready to Hand, for Staving Off the Impending Famine in this Essential Material

Tiny Air Bubbles and Giant Dams
How Air Jets Protect a Great Dam Against the Destructive Fields of Ice

New Orleans' Big Port Improvement
Preparing for the Future World Trade of the Southern Metropolis

An Automatic Hand on the Throttle
Principle and Features of the Sprague System of Automatic Train Control

After Ashokan--What?
Doubling the World's biggest Water-Supply System to take care of the Future

Pullman and Caboose Radio
The Pioneer Work of the Lackawanna Railroad in Applying Radio to the needs of Land Travel Roverts

The Industrial Production of Helium
Long Strides in the Past Five Years Toward the Non-Explosive Airship

The Hydraulic Laboratory
A Prime Aid in Helping us to make the most of our Waterpower Resources

Power in Big Packages
Some of the Economies to which we may look Forward if We Pool Our Fuel-Burning Plants

Harnessing Our Waterpower
Why We Should Make the Most of Such Resources Within Our Boundaries

Cutting Out a Railroad Hazard