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American Industries.--No. 87

Six Hundred and Fifty Miles by Telephone

Sanitary Precautions After Floods

Early Steam Engines and Boilers

The Leffel Turbine

Improved Railway Elevator

Improved Fence Post

New Feed Water Heater and Lime Extractor

Abacus Attachment for School Slates

Improved Vertical Engine

Improved Railroad Crane

Mechanical Inventions

Miscellaneous Inventions

Agricultural Inventions


  • Departments


  • Recent Inventions

  • Notes and Queries

  • Business and Personal

  • Index of Inventions

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