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  Somw of the dates are not exact because I couldn't find them in the textbook or online, but all of the years should be accurate.
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  Mid 1880's - Mid 1890's, specializing in the treatment of hysteria
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  Mid 1890's is when he proposed this idea
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  From 1903-1908
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  For research on the physiology of digestion
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  Lasted from approximately 1930 to 1960
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  He studied for 9 years at the University of Minnesota! :)
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  From the 1940's to 1950's
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