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A Tiny Railroad, at Once a Toy and a Tool, Stained Glass Once More in Vogue and more

A Chemical Loafer, and How it was Put to Work

Argon, the Laziest of All the Elements, Plays a Big Role in the Latest Incandescent Lamps

By E. W. Davidson

Pedigreed Chicks, A New Form of Vibration Galvanometer

Digging and Loading in One Motion

By B. F. Mundorff

Mining Coal with a Dredge

By George Gaulois

Turning the Wheels of a Century Hence--III

What the United States Must Do to Forestall the Day When Fuel Goes Beyond the Common Reach

By C. H. Claudy

Fighting Waves with Compressed Air

An Artificial Reef of Air That Breaks Up the Rollers and Makes Them Harmless

By George F. Paul

What About Our Forests?

How Long Shall We Be Able to Cut Them Down Four Times as Fast as They Grow?

By H. A. Mount

"Resolute" Defends the Cup

Why "Resolute" Was Chosen and Her Prospects of Defeating "Shamrock IV"

By J. Bernard Walker

The Man Behind Our Daily Bread

Grading and Testing Grain for Sale on the Grain Exchanges of the Country

By Robert H. Moulton

Preventing the Oxidation of Metals from Heat, Ball Bearings in Steamship Engines, Invention in Flashlight Photography


  • Departments

    Correspondence - July 17, 1920

  • The Motor-Driven Commercial Vehicle

  • Recently Patented Inventions - July 17, 1920

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