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Features

Panama Canal Architecture, A Suggestion for Suburban Traffic and more

The Arches of Mexico

Relics of Early Spanish Engineering

By Mary Worrall Hudson

Battleship Drill Indoors

How New York Trains Her Naval Militia

The Reflector--The Telescope of the Future

Why the Large Refractor Must Give Way to Mirrors

By Edward Arthur Fath

Carrier Pigeons in the French Army

By Lucien Fournier

Curious Resemblances in Nature

By Harold Bastin

A Seconds Pendulum

By C. C. Kiplinger

A Clock That Speaks the Time of Day

By W. R. I.

A Mercury Interruptor

By George F. Worts

German Inventors and Office Furniture, The International Cone of Zoology

The Industrial Need of Technically Trained Men--V

A Variety of Avenues Open to the Young Man of To-day

By A. B. Quincy

Departments

  • Letters

    Correspondence - July 12, 1913

  • Recommended

    New Books, Etc. - July 12, 1913

  • Departments

    Inventions New and Interesting - July 12, 1913

  • Recently Patented Inventions - July 12, 1913

  • Notes and Queries - July 12, 1913

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July 12, 1913

See the World from a Different Perspective

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