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Train Ferries for the English Channel

National Swamp Reclamation

The Use of the Gyroscope in Connection with Airships

Light on the Quebec Bridge Disaster

Electric Sunstroke

The New Bridge over the Wissahickon at Philadelphia

By J. A. Stewart

The Transit of Mercury

By S. A. Mitchell

The Enlargement and Reconstruction of Governor's Island

The Peters Self-Registering Electric Target for Rifle Ranges

By the English Correspondent of the Scientific American

The Nests and Nurseries of Insects

By Percy Collins

Some Experiments with a Mirror

By Gustav Michaud

Patent Department - November 30, 1907

An Improved form of Reinforced Concrete Pipe

Combined Water Heater, Filter, and Cooler

A New Type of Storage Battery

Improved Boring Bar


  • Letters

    Correspondence - November 30, 1907

  • Departments

    The Heavens in December 1907

  • Index of Inventions - November 30, 1907

  • Recently Patented Inventions - November 30, 1907

  • Patents - November 30, 1907

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