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Improved Road and Farm Locomotive

Pressure Not a Motive Power

Why do Plants Absorb Oxygen during the Night?

Governors for Prime Movers

The American Social Science Congress

Milk as a Diet and Its Effect on the System

The Respiration of Oxygen

The Polar Clock--The Time of Day Shown by Colors

Hydraulic Riveting Machine

Improved Miter Machine and Frame Vise

Todd's Improved Horseshoe

Jenkins' Patent Compound Hatchet

Improved Doubletree

The Seaforthia Elegans

Recent American and Foreign Patents - May 30, 1874

Bursting of a Mountain Water Reservoir in Massachusetts--A Terrible Calamity

Answers Correspondents - May 30, 1874

Communications Received - May 30, 1874

Canadian Patents - May 30, 1874


  • Letters

    Correspondence - May 30, 1874

  • Recommended

    New Books and Publications - May 30, 1874

  • Departments

    Business and Personal - May 30, 1874

  • Index of Inventions - May 30, 1874

  • Patents - May 30, 1874

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