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Dangers of Large Fly Wheels

An Adjustable Picture Hanger

A Machine and Hand Needle Threader

A New Electric Light Support

A Trundler for Spooled Wire

Hog Killing at the Chicago Stock Yards

How Stone is Crushed and Screened

The Manchester Ship Canal


  • Letters

    Correspondence- November 7, 1891

  • Recommended

    New Books and Publications- November 7, 1891

  • Departments

    Recently Patented Inventions- November 7, 1891

  • Index of Inventions- November 7, 1891

  • Business and Personal- November 7, 1891

  • Notes & Queries- November 7, 1891

  • To Inventors- November 7, 1891

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Dwindling Supply. Increasing Demand.

Dwindling Supply. Increasing Demand.

Solving the Water Crisis