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American Institute Fair

An Annunciator for Burglar Alarms, Etc.

A Simple Mechanical Motor

An Improved Stalk Cutting Machine

An Improved Ventilator or Blower

A Boiler Feeder, Regulator, and Alarm

An Improved Pipe Joint

The German Army Swimming Exercises

Bad Paving in New York

A Mousetrap

An Improved Flat Iron and Heater

A Simple and Convenient Music Holder

A Proposed "Whaleback" Passenger Steamer

By Harold Avery

Electrical Rock Drills

A Twin Screw Launch Run by a Compound Engine

The "Otto" Gasoline Engine

Electric Mining Locomotives


  • Letters

    Correspondence- November 14, 1891

  • Departments

    Recently Patented Inventions- November 14, 1891

  • Notes & Queries- November 14, 1891

  • Business and Personal- November 14, 1891

  • To Inventors- November 14, 1891

  • Index of Inventions- November 14, 1891

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