X 



THE FOEE-BEAIN 



539 



Frochaska (1749-1820) made notable progress in defining the 

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



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Fio. 27'2. Diagram to show tlu- layers of cells'andjfibres in tlie grey matter of the human cerebra 

 cortex, according to three histological methods : (a) Golgi ; ('-/) Nissl ; (r) Weigert. (O. Vogt.) 



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

 different acts of intelligence have distinct organs in the brain. 



