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Erosion--The Last Problem for the Gunmaker

The Worst Enemy of the Good Roads Movement

Stupendous Traffic of Greater New York

A New Airship

The “Virginia” Potato

By W. R. Gerard

Photograph of the "Pennsylvania."

Road Tarring in France

By the Paris Correspondent of the Scientific American

Hot-Water Supplies to Towns

By Thomas Parker

Gila Monsters

By D. A. Willey

Modern Bell Casting

By Alfred Gradenwitz

The Growth of Our Navy Since the War

A Simple Canceling Machine

Support for Fire Hose

Means for Automatically Balancing Rotating Masses

Implement for Plowing or Cultivating Around Trees

Business and Personal Wants

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September 15, 1906

See the World from a Different Perspective

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