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The Seven Ages of Our World

An Improved Ballot Box

An Improved Hose Coupling

Intelligence of Parrots

A Simple Camera Shutter

The Shely Fiber Breaker

Sheeley's Canning or Preserving Jar

From Chaos to Man

By Garrett P. Serviss

Improved Punching and Shearing Machine

The Chronograph


  • Letters

    Correspondence- June 25, 1892

  • Departments

    Business and Personal- June 25, 1892

  • Notes and Queries- June 25, 1892

  • Recently Patented Inventions- June 25, 1892

  • Index of Inventions- June 25, 1892

  • To Inventors- June 25, 1892

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Dwindling Supply. Increasing Demand.

Dwindling Supply. Increasing Demand.

Solving the Water Crisis