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The Utilization of Knowledge

The American Fish Culturists' Convention

Pigs and Babies

An Invention Wanted for Utilizing Flax Refuse

The International Exhibition of Electricity at Paris, 1881

Charges for Handling Grain in New York Harbor

New Embroidering Frame

New Perforating Machine

American Industries.--No. 71

The Reese Fusion Disk

The Velocipede Hand Car

Miscellaneous Inventions

Improved Refrigerator

Simplified Holtz Electrical Machine

By Geo M. Hopkins

Lavater's Apparatus for Taking Silhouettes

Mechanical Inventions


  • Departments


  • Recent Inventions

  • Business and Personal

  • Notes and Queries

  • New Books and Publications

  • Index of Inventions

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April 16, 1881

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