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Improved Steam Street Cars

A Remarkable Test Plate

The Fair of the American Institute

Our Five Hundred Thousand Dollar Commissioner to Vienna

Italian Industrial Progress

Astronomical Notes

New Plan for a Local Fire Department

Steam Traction

Scientific and Practical Information

Scientific and Mechanical Possibilities

Remarkable Magnetic Storms and Auroras in Europe

Improved Steam Engine

Lathe Center Grinder

Transmission of Motion

Inventions and Suggestions for the Prevention of Fires

The Consciousness of Dogs

How Money is Made

Decisions by the Commissioner of Patents

Decisions of the Courts

Answers to Correspondents

Recent American and Foreign Patents

Value of Patents, and How to Obtain them

Practical Hints to Mentors

Patent Cold Rolled Shafting


  • Departments


  • Business and Personal

  • New Books and Publications

  • Notes and Queries

  • Index of Inventions

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December 07, 1872