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Improved Magnetic Combination Lock, Method of Lighting Theatres, and more

Abattoir for New York

Miscellaneous Summary

The Madstone--A Delusion

The Anthistometer or Measurer of Resistance

The Markets

English and American Guns

Boiler Explosions Not Always Mysterious

The Use of Fuel--Management of Bitu Minous Coal

Patent Claims

New Publications

Peck's Patent Patched Bullet


  • Departments


  • New Inventions

  • Notes and Queries

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Dwindling Supply. Increasing Demand.

Dwindling Supply. Increasing Demand.

Solving the Water Crisis