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The World's Columbian Exposition--The Babcock & Wilcox Boiler Plant

New Inventions for Street Cleaning Wanted in New York City

The New Congressional Library Building

Notes From the Worlds Columbian Exposition Chicago 1893

A New Bicycle Gear

A Novel Support for Velocipede Saddles

Duplex Lathe for Cranks

A Photographic Flash Light Apparatus

Recording Time of Employees

The “Duplex” Slide Rule

A Combined Pitchfork and Band Cutter

A Gas Lighter or Extinguisher

Coal Conveyer at Weehawken, N. J

Brooding Snakes

The Race of Stilt Walkers at Bordeaux

To Inventors


  • Departments


  • Recently Patented Inventions

  • New Books and Publications

  • Notes and Queries

  • Index of Inventions

  • Business and Personal

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Dwindling Supply. Increasing Demand.

Dwindling Supply. Increasing Demand.

Solving the Water Crisis