- Scientific American 1912-12-14 1355 visits
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- Scientific American 1913-12-13 1396 visits
- Scientific American 1913-12-20 1143 visits
- Scientific American 1913-12-27 1195 visits
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- Scientific American 1915-01-02 1349 visits
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- Scientific American 1915-03-06 Back-Cover Ad 1735 visits
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- Scientific American 1915-06-05 Back-Cover Ad 1336 visits
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