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Features

Seattle's Record Pier, Where the Lumber Goes and more

By Ralph Howard

That Parallel Postulate

The Dividing Line between Euclidean and Non-Euclidean Geometry, and What the Latter means by The Einstein Prize Essay Editor

Illiterate Adults

Our Growing Population that Reads and Writes in Other Languages or None at All

By Winthrop Talbot

Cover Crops for Our Orchards

By H. A. Crafts

Motor Trucks in Orchards

By Arthur L. Dahl

A Railroad to Hudson Bay!

New Resources in Wheat and Copper that are Expected to Contribute to its Support

By Anthony M. Rud

Items in Brief

A Department Devoted to Current News in all Fields of Pure and Applied Science

Asbestos in Architecture

The Growing Importance Played by this Fibrous Substance in Modern Building

By Robert G. Skerrett

The Flyer's Artificial Eye and Ear, Finding a Cool Hat

By Alfred Gradenwitz

When a Lighting Fixture is not a Fixture, What is Dry Rot?

By George Gaulois

Departments

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    The Heavens in December, 1920

  • Inventions New and Interesting

  • Recently Patented Inventions

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December 1920

See the World from a Different Perspective

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