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Improved Boiler and Feed Water Heater

Rapid Transit in New York

A City One Hundred and Eighty Thousand Years Old

The Strength of Insects

Collegiate Races


Dangers of Chloral Drinking

Prospects of Science on the Pacific Slope

Improved Treadle Sawing Machine

Device for Protecting Horses

Improved Air Reservoir

New Clinical Thermoscope

Improved Slide Valve Calculator

Cavender and Dallas' Corn Husking Implement

Alley's Bearing Feeler

Smith's Improved Awl

Improved Milking Tubes

Steller'a Blind Slat Holder

The Ficaria

The Cycads

The Jamin Magnet

Scientific and Practical Information - July 31, 1875

Decisions of the Courts - July 31, 1875

Recent American and Foreign Patents - July 31, 1875

Canadian Patents - July 31, 1875

Communications Received - July 31, 1875


  • Letters

    Correspondence - July 31, 1875

  • Recommended

    New Books and Publications - July 31, 1875

  • Departments

    Notes and Queries - July 31, 1875

  • Business and Personal - July 31, 1875

  • Index of Inventions - July 31, 1875

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