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Scientific American Magazine Vol 49 Issue 15

Scientific American Magazine

Volume 49, Issue 15

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Features

Edison Dynamo Electric Light Machine

Obach's Galvanometers

Natural History in Public Schools

The Making of Steel Pens

Petroleum for Heat

Marengo Cavern

H. C. Hovey

Automatic Circuit Closer

Counterbalance

Novel Sewing Machine Shuttle

Fire Arm

Deep Rock Cuts Near New York

Wagon Tongue Support

The Cable Cars of the Brooklyn Bridge

The Crowned Pigeon

The Champion Steam Trap

Pole and Shaft for Vehicles

Agricultural Inventions

Engineering Inventions

Miscellaneous Inventions

Mechanical Inventions

Departments

Correspondence

New Books and Publications

Business and Personal

Notes and Queries

Index of Inventions