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    December 25, 1909

    Scientific American

    December 25, 1909

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    December 18, 1909

    Scientific American

    December 18, 1909

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    December 11, 1909

    Scientific American

    December 11, 1909

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    December 04, 1909

    Scientific American

    December 04, 1909

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    November 27, 1909

    Scientific American

    November 27, 1909

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    November 20, 1909

    Scientific American

    November 20, 1909

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    November 13, 1909

    Scientific American

    November 13, 1909

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    November 06, 1909

    Scientific American

    November 06, 1909

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    October 30, 1909

    Scientific American

    October 30, 1909

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    October 23, 1909

    Scientific American

    October 23, 1909

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    October 16, 1909

    Scientific American

    October 16, 1909

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    October 09, 1909

    Scientific American

    October 09, 1909

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