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The Otis Elevators at the Columbian Exposition

How to Become an Electrical Engineer

Notes from the Worlds Columbian Exposition Chicago 1893

Lathe Slide Rest Attachment

The Teaching of Swimming

A Durable and Efficient Pump

Suckow's Machine for Squeezing Puddlers' Balls and the Mannesmann Seamless Tube Machine

Pianos and Organs at the Fair

New Apparatus for Artificial Respiration

Prize Cattle at the World's Columbian Exposition

Beveling and Silvering Mirrors

To Inventors


  • Departments


  • New Books and Publications

  • Recently Patented Inventions

  • Business and Personal

  • Index of Inventions

  • Notes and Queries

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October 28, 1893

20% Sitewide for President's Day