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Difficulties in Constructing the Great Catskill Aqueduct Siphon

Proposed New Ships for the Navy

The Mastery of the Ocean

The President on Employers' Liability

The Motor Boat Show at the Grand Central Palace

Recent Automobile Endurance Tests

The Belin Process of Telephotography

By Jacques Boyer

Mexican Fiestas

By Katherine Louise Smith

An Artificial Horizon for Sextants

The Detroit River Tunnel

By James Cooke Mills

Recent Archæological Discoveries in Egypt

By the English Correspondent of the Scientific American

A Chromatic Illusion

By Gustave Michaud

New and Ingenious French Toys


  • Letters

    Correspondence - December 21, 1907

  • Recommended

    New Books, Etc. - December 21, 1907

  • Departments

    Notes and Queries - December 21, 1907

  • Recently Patented Inventions - December 21, 1907

  • Index of Inventions - December 21, 1907

  • Patents - December 21, 1907

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