When1: 1907
When2: 1913
Who: Henri Pieron [Pieron, Henri]
What: psychologist
Where: Paris, France
works\ Physiological Problem of Sleep [1913]
Detail: He lived 1881 to 1964, founded French experimental psychology, and studied sleep. He claimed to find hypnotoxin or sleep-promoting substance [1907, with Rene Legendre], in cerebrospinal fluid.
Social Sciences>Psychology>History>Behavior
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Date Modified: 2022.0224