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The Chicago Waterworks

Ozone and the Sanitology of Odors

“Patent Perfidy.”

Photophonic and Spectrophonic Discoveries

The National Academy of Sciences

The Date of the Glacial Era in Eastern North America

Public Works in New York City

Improvement in the Construction of Fences and Posts

Recent Decisions Relating to Patents

Miscellaneous Inventions - May 7, 1881

Improvement in Water Elevators

Improvement in Animal Shears

Improved Optometer

Manufacture of Real Lace by Machinery

Agricultural Inventions - May 7, 1881

Coffee.--its Uses and Medicinal Qualities

By Henry Segur


  • Departments

    Correspondence - May 7, 1881

  • Notes and Queries - May 7, 1881

  • Business and Personal - May 7, 1881

  • Index of Inventions - May 7, 1881

  • New Books and Publications - May 7, 1881

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May 07, 1881

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