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The Undulatory Theory of Odors

Gas Meters as Helps to Fires

The Edison Electric Light

Aspects of the Planets for January

The Modified Instincts of a Blind Cat

By H. C. Hovey

American Industries--No. 85

Sheffield Section Hand Car

Boys' Power Meter

Protector for Buildings

Automatic Fly Fan

The Brush-Swan Electric Light

Communications Received


  • Departments

    Notes and Queries

  • Business and Personal

  • New Books and Publications

  • Index of Inventions

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