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Edison Dynamo Electric Light Machine

Obach's Galvanometers

Natural History in Public Schools

The Making of Steel Pens

Petroleum for Heat

Marengo Cavern

By H. C. Hovey

Automatic Circuit Closer


Novel Sewing Machine Shuttle

Wagon Tongue Support

Fire Arm

Deep Rock Cuts Near New York

The Cable Cars of the Brooklyn Bridge

The Crowned Pigeon

Pole and Shaft for Vehicles

The Champion Steam Trap

Agricultural Inventions

Miscellaneous Inventions

Engineering Inventions

Mechanical Inventions


  • Departments


  • Business and Personal

  • New Books and Publications

  • Index of Inventions

  • Notes and Queries

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Scientific American Health & Medicine

Scientific American Health & Medicine