X 



THE FOEE-BEATN 



539 



< Prochaska (1749-1820) made notable progress in denning the 

 seat of mental phenomena. He held the brain in general to be 



.'* v.i- ^i?!?: 



PIG. 272. Diagram to show the layers of cells and fibreslin the grey matter of the human cerebra 

 cortex, according to three histological methods : (a) Golgi ; (b) Nissl ; (c) Weigert. (O. Vogt.) 



the organ of thought, but believed it not improbable that the 

 different acts of intelligence have distinct organs in the brain. 



