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Newport Conference Approves Designs of New Battleships

Detection of Sulphurous Acid in Foodstuffs

Legislation to Prevent Forest Fires




Brazilian Battleship "Minas Geraes"—Most Powerful Fighting Ship Afloat

A Hydraulic Drive System

New Discoveries about Lightning

By James Cooke Mills

Progress on the Panama Canal

Santos Dumont's Latest Aeroplane

The Fourth Aeroplane of the Aerial Experiment Association

Mechanism of the Ovipositor Drill

By S. Frank Aaron

Brake Mechanism for Wagons

Grain-Washing Machine

Improved Railroad Tie

Novel Boat-Propelling Device

Patent Department


  • Departments


  • Recently Patented Inventions

  • Notes and Queries

  • New Books, Etc.

  • Index of Inventions

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Dwindling Supply. Increasing Demand.

Dwindling Supply. Increasing Demand.

Solving the Water Crisis