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    Features

    Casting Pipe Centrifugally

    Protection for the Port of New York, Conservation of the Nation's Water Power, and more

    The High Heel in Motion Picture and X-ray

    The Latest Scientific Wrinkles as Applied by French Doctors to Investigating This Sore Subject

    By Jacques Boyer

    Who Exports--And How?

    Where Manufacturer, Commission Man and Export House Come In

    By Crittenden Marriott

    The Twentieth Century Trolley Hospital

    Some of the Interesting Features of Cleveland's Big Electric Railroad Repair Shop

    Shotguns for Our Aviators

    By Edward C. Crossman

    The Spad Pursuit Biplane

    "THE most successful fighting airplane in the world today"

    By John Jay Ide

    A Steel Mule that Drives Like a Horse

    By J. M. Bird

    Mechanical Equipment of the Farm

    Latest developments in agricultural machinery and practical suggestions for the farmer

    By Harry C. Ramsower

    France-England Airplane Postal Service

    Nitrate for Farmers at Cost, Trade Marks in Great Britain, and more

    Departments

    • Letters

      Correspondence- February 2, 1918

    • Recommended

      New Books, Etc.- February 2, 1918

    • Departments

      The Heavens in February, 1918

    • Inventions New and Interesting- February 2, 1918

    • Recently Patented Inventions- February 2, 1918

    • Notes and Queries- February 2, 1918

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    February 02, 1918

    See the World from a Different Perspective

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