792 



2. that there is no difference in variability in the Heschl convo- 

 lution of normal and deaf and dumb people, although an examina- 

 tion of the microscopic image of the two categories might suggest 

 such a difference. 



3. that Droogleever Fortuyn's ') surmise that a diminution in the 

 giant cells might be ascribed to deaf-mutism, which surmise was 

 suggested to him by the examination of two cases of deaf-mutism, 

 is not borne out by the facts. 



Leiden, Anatomical Cabinet, Histological Department. 



1) Archives of Neurology, Vol. 5, 1911. 



