EEPOfeT ON DOtTRINE. 



on the site of it at a much later date, while the cause of the 

 ones which reappear on one or more occasions will be specially 



referred to later. 



TABLE IV 



Showing the shortest, longest, and mean duration of the primary 

 plaques observed in each Dourine animal. 



Showing the shortest, longest, and mean duration of plaques which 

 appeared a second time in Dourine animals. 



Showing the shortest, longest, and mean duration of plaques which 

 appeared a third time in Dourine animals. 



