Skip to main content

Features

Direct Current vs. Induction Motor for Electric Traction

Colombia and the Panama Canal

A Problem for the Air-Ship Builder

The Trap-Lantern as an Insect Exterminator

By Harold Bolce

Balloon Measurements of Mammoth Cave's Height

By Horace C. Hovey

Concrete House Building

Automatic Paper-Feeders for Printing Machinery

Development of the 90-Foot Racing Yacht

Improved Breech Mechanism for Heavy Guns

Light Motor for a St. Louis Contest Airship

Improved Valve Mechanism

Cable Grip or Clutch Device

Machine for Grooming and Shampooing Horses

Departments

  • Ask the Brains

    Notes and Queries - August 29, 1903

  • Departments

    Correspondence - August 29, 1903

  • Index of Inventions - August 29, 1903

  • Recently Patented Inventions - August 29, 1903

  • Business and Personal Wants

Purchase To Read More

Already purchased this issue? Sign In to Access
Select Format
August 29, 1903

See the World from a Different Perspective

Subscribe to Scientific American MIND