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DISCUSSION 



Mcllwain : William of Ockham continues that entities should not be 

 multiplied more than is necessary. Prof. Potter has introduced a new 

 entity into the discussion : one composed partly of cerebral tissues and 

 partly of preparations from the liver. It is interesting to speculate how 

 this entity might differ from ordinary tissues. It is a peculiarity of the 

 hexokinase in cerebral tissues that most of it is removed in the particulate 

 matter during many types of extraction ; so that your system might be 



