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Features

A Lock Canal for Panama

Seeds and Suspended Animation

Redwood in the San Francisco Fire

Comparison of Western Irrigation Reservoirs and the New Croton Dam

Orientation of Carrier Pigeons

The Italia Airship

The Laying of a 10,000-Volt Cable

By Alfred Gradenwitz

Making the Flags of Our Warships

By Walter L. Beasley

How Glaciers are Studied

By Charles Wiles

Oil Fuel on Southwestern Railroads

By Day Allen Willey

Supplying New York With Bluefish

An Electrolytic Wireless Receiver

By D. L. Beardsley

Replacing the Broadway Drawbridge with a New Span

Business and Personal Wants

Read This Column Carefully.-You will find inquiries for certain classes of articles numbered in consecutive order. If you manufacture these goods write us at once and we will send you the name and address of the party desiring the information, In every case it is necessary to give the number of the Inquiry.MUNN CO

Departments

  • Departments

    The Heavens in July

  • Correspondence

  • Recently Patented Inventions

  • Index of Inventions

  • Notes and Queries

  • Patents

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June 30, 1906

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