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Concrete and Crushed Rock

The Effect of the Sea Upon Climate

British Merchant Marine and the Commerce Destroyer

Elevation of Outer Rail on Curves

A Severe Earthquake in South America

The Nickel Ore Mines of Canada

Wanted: Brains to Dissect

By Charles Stirrup

New Asteroid Camera at the Naval Observatory

By C. H. Claudy

Finishing Touches to the New Croton Reservoir

Japanese Military Sanitation and Hygiene

By Baron K. Takaki

The British Battleship "Dreadnought."

A Wheel Which Carries Its Own Track

By F R. Houssay

An Automatic Street Sweeper and Sprinkler

Check Attachment for Pulleys and Chocks

Ore Stamp Mill

Car Axle and Wheel

Improved Vehicle Spring

Business and Personal Wants


  • Departments


  • Recently Patented Inventions

  • Index of Inventions

  • Notes and Queries

  • Patents

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