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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

Pianos and Organs at the Fair

A Durable and Efficient Pump

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

New Apparatus for Artificial Respiration

Prize Cattle at the World's Columbian Exposition

Beveling and Silvering Mirrors

To Inventors


  • Departments


  • Recently Patented Inventions

  • New Books and Publications

  • Index of Inventions

  • Business and Personal

  • Notes and Queries

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