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Features

Our Trade With South America, The Quebec Bridge Competition, and more

Hudson Maxim

A Noted Inventor of High Explosives

The Hydro-aeroplane

Some of the Latest Biplanes Which Have Been Fitted with Floats in Order to Make Soaring From the Water Possible

The Power of the Human Jaw

The Work We Do in Biting and Chewing

The Manufacture of Yeast

An Important Fermentation Industry

The Latest Photograph of the Planet Mars

By Mary Proctor

Abstracts from Current Periodicals- December 2, 1911

Phases of Science as Other Editors See Them

Suggestions for the Workshop- December 2, 1911

Ingenious Expedients of Resourceful Mechanics

By William J. Horner

Bending a Brass Tube

By A. F. Clark

Knife Made from a Hacksaw Blade

By H. M. Nichols

Turning Duplicate Forms

By Albert F. Bishop

The First National Mine-Safety Demonstration

Study of a Real Mine Explosion

By Charles L. Wright

Departments

  • Letters

    Correspondence- December 2, 1911

  • Recommended

    New Books, Etc.- December 2, 1911

  • Departments

    The Heavens in December, 1911

  • The Inventor's Department- December 2, 1911

  • Recently Patented Inventions- December 2, 1911

  • Notes and Queries- December 2, 1911

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Know Before You Vote