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Life-Saving Apparatus at the Recent Naval and Submarine Exhibition

Preparation of Lactic Acid

Aspects of the Planets for June

Nullification of the Patent Laws

Congressional Engineering

Torpedo Boat for the Italian Government

New Bottle Cleaner

Novel Burglar Alarm

Novel Window Blind Operator

New Nut Lock

Improved Railroad Switch

Simple Sound Recorder

By M. Hopkins

Successful Management of the Insects Most Destructive to the Orange

By C. V. Riley

The Use of Ammonia in Baking Powders and its Importance as a Culinary Agent

Mechanical Inventions - May 27, 1882

Metallurgical Invention - May 27, 1882

Engineering Inventions - May 27, 1882

Miscellaneous Inventions - May 27, 1882

Agricultural Invention - May 27, 1882


  • Departments

    Notes and Queries - May 27, 1882

  • Business and Personal - May 27, 1882

  • Index of Inventions - May 27, 1882

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