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    Electrification of a Chicago Railway Terminal

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    A Machine for Simultaneously Firing Many Blasts

    By Frank C. Perkins

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    Photographing a Star Spectrum

    By S. A. Mitchell

    A Pollen-Gathering Patent Dedicated to the Public

    The Phases of Venus

    By Frederic R. Honey

    An Aerial Passenger Railway

    By Roland Ashford Phillips

    How Your Eyeglasses are Made

    By C. H. Claudy

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    By Walter L. Beasley

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    December 25, 1909

    See the World from a Different Perspective

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