The Worst Enemy of the Good Roads Movement

Erosion--The Last Problem for the Gunmaker

Stupendous Traffic of Greater New York

A New Airship

The “Virginia” Potato

Photograph of the "Pennsylvania."

Road Tarring in France

By the Paris Correspondent of the Scientific American

Hot-Water Supplies to Towns

Modern Bell Casting

Gila Monsters

The Growth of Our Navy Since the War

Means for Automatically Balancing Rotating Masses

A Simple Canceling Machine

Support for Fire Hose

Implement for Plowing or Cultivating Around Trees

Business and Personal Wants