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Tea, Coffee, and Tobacco
1890
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Is Long Life Worth the Effort to Attain It?
2/1893
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Recent Improvements in Medicine
1895
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The Propagation of Disease
1897
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The Quaker Experiment in Government in Pennsylvania
1901
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Infection and Contagion
1903
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Laughter and Its Influence
4/1907
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Why We are Right or Left Handed
7/1909