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Features

When was America Discovered?

By M. R. Harrington

Research in the Future

Unique Developments in Science and Industry.

By L. W. Chubb

The Mystery of the Unknown Lines

By Henry Norris Russell

Cables that Reduce Your Telephone Bill

By J. R Shea

Floating "Suspension Bridge" Protects Dams

What Professor Ritchey is Doing

Why the New Ritchey-Chretien Telescope Now Under Construction Will Be Far in Advance of Existing Types

By Albert G. Ingalls

'Rubber' From A Chemical Laboratory

By F. D. McHugh

Why Build Up Our Navy Now?

The Big Business of Biscuits

Delivered to the Home Ready for the Oven

The Evolution of the Universe

By Reverend E. W. Barnes

Ten Greenwich Avenue--For Ladies Only

An Egyptian Temple Yields its Secrets

Concerning the Shark

By Charles Haskins Townsend

How the Bureau of Mines Aids the Mineral Industry

By Albert A. Hopkins

Departments

  • Departments

    Across the Editor's Desk, July 1932

  • Back of Frontispiece, July 1932

  • Unearthing Evidences of the Early Indian

  • Our Point of View, July 1932

  • Treatment Prevents Wood Sap Stains, Fabrics Not Weakened by Cleaning Solvents and more

  • Patents and University Research, Austrian War-Time Inventors to be Paid and more

  • Books Selected By the Editors, July 1932

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July 1932

See the World from a Different Perspective

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