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PHYSIOLOGY: J. F. McCLENDON 
a few minutes due to elimination of CO2. After seven hours without 
O2, nerve conduction and noticeable contractility of muscle returns in 
thirty seconds after suspending the Cassiopea in air. 
Since 02-tension may affect metabolism, it seems probable that 
changes in the threshold of stimulation of the respiratory and vasomotor 
centers may affect metabolism in man and mammals. The details of 
the experiments will be published elsewhere. 
