Word: weigand
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Dates: during 1920-1929
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...record their every movement while sleeping. The most nervous subject stirred once every eight minutes. The most inert, once every 25 minutes. The average: 13 minutes between stirs. Purpose of the experiment: to discover the efficiency of beds, springs, mattresses, pillows.?H. M. Johnson and G. 'E. Weigand, Mellon Institute, Pittsburgh...