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Adding Color to the Motion-Picture Screen, Progress in Electrification of Swiss Railways and more

The Overhead Cable Crossing

Largest Electric Transmission Span in the World, at Three Rivers, Quebec

By J. F. Springer

Determining the Heating and Cooling Curves of Metals

By S. R. Winters

The Dendrograph--An Instrument that Keeps Tabs on Tree Growth, A Fire-Fighting Equipment on Rails

By Wm. A. Murrill

The Architecture of the Molecule

Some of the Things Which the Langmuir Postulates Tell Us About the Chemical Compounds

By Oscar R. Foster

Ancient Remains in Colorado

The Mesa Verde National Park, Landmark of a Lost Race

By J. Walter Fewkes

A Racing Car with Two Engines

By Victor Pag

An Old Departure in Theater Building

By Alfred Gradenwitz

Solving the Short-Haul Problem

The Role of the Light, Narrow-Gage Railway in the Local Transportation of the Future

By Charles F. Lang


  • Departments

    Correspondence - May 29, 1920

  • The Heavens in June, 1920

  • Inventions New and Interesting - May 29, 1920

  • Recently Patented Inventions - May 29, 1920

  • Notes and Queries - May 29, 1920

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