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The Blackwell's Island Bridge

Charles Darwin

The Loss of the Arctic Search Steamer Rodgers

Aspects of the Planets for May

A Novel Sled

New Electric Log

New Grain Drier

New Life Boat Plug

New Acoustic Telephone

Engineering Inventions

Mechanical Inventions

A New Ore Mill

Jerboas, or Leaping Mice

The Tile Fish

By Daniel C. Beard

Miscellaneous Inventions

Communications Received


  • Departments


  • Business and Personal

  • Notes and Queries

  • Index of Inventions

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