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Scientific American Magazine Vol 46 Issue 21

Scientific American Magazine

Volume 46, Issue 21

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Features

Life-Saving Apparatus at the Recent Naval and Submarine Exhibition

Preparation of Lactic Acid

Nullification of the Patent Laws

Aspects of the Planets for June

Congressional Engineering

Torpedo Boat for the Italian Government

New Bottle Cleaner

Novel Burglar Alarm

New Nut Lock

Novel Window Blind Operator

Simple Sound Recorder

M. Hopkins

Improved Railroad Switch

Successful Management of the Insects Most Destructive to the Orange

C. V. Riley

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

Miscellaneous Inventions - May 27, 1882

Mechanical Inventions - May 27, 1882

Metallurgical Invention - May 27, 1882

Agricultural Invention - May 27, 1882

Engineering Inventions - May 27, 1882

Departments

Index of Inventions - May 27, 1882

Business and Personal - May 27, 1882

Notes and Queries - May 27, 1882