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    Features

    A Button Industry from Ocean Pearl

    By Grace Lockhart

    Wild Life in a Fire

    By Duane H. Kipp

    Flying Instruction as it Should Be

    By George W. Orr

    How you are Influenced by Color

    By Solon R. Barber

    Is Interstellar Space Wholly Empty

    By Henry Norris Russell

    A Day With a Locksmith

    By Albert A. Hopkins

    The Perspective of Modern Physics

    By Paul R. Heyl

    A Tinted Statue From Pompeii's Ashes

    It Pays to be a Pioneer

    By Milton Wright

    Natural Gasoline from Oil Wells

    By G. Ross Robertson

    Pose Yourself For Your Portrait

    Into a Hidden World

    By M. C. Swingle

    Asquith and Kitchener

    (Concluded from August)

    By W. D. Puleston

    "Form" Letters With A Personal Touch

    World Affairs and the Telephone

    How Ancient is Modern Man?

    By J. Reid Moir

    Cotton Cloth Fit for a King

    By Donald A. Laird

    Departments

    • Departments

      Across the Editor's Desk, September 1931

    • Back of Frontispiece, September 1931

    • France's Reply to Germany's "Pocket Battleship"

    • Our Point of View, September 1931

    • New Soap has no Taste, A Telephone Call-Recorder and more

    • Single Court of Patent Appeals, Inventor Convicted of Fraud and more

    • Books Selected By The Editors, September 1931

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    September 1931

    Reanimate Your Brain

    31% Off for Halloween

    Learn More