1894.] Researches into the Functions of the Cerebellum. 57 



logical disturbance observed after diminution of the intra-cranial 

 cavity. 



In the animals experimented on, any considerable increase of the 

 intra-cranial pressure above the normal (about 10 mm. mercury) 

 interferes with or arrests the cerebral circulation. 



A further Result. November 27, 1893. 



On driving salt solution coloured with methyl blue into the sub- 

 dural space at the rate of 1 c.c. a minute, the urine which was 

 collected from one ureter became of a blue colour in from 15 to 30 

 minutes. On post-mortem examination, the upper portion of the first 

 lymph gland in the cervical chain was found to be coloured blue ; iu 

 the central nervous system the blue colour was found limited to the 

 cerebral hemisphere on the side of injection, the base of the brain, 

 and the cervical region of the cord. Conclusion The blood vessels 

 form the pathway of absorption of fluid from the subdural space. 



The expenses of the above research have been partly defrayed by a 

 grant from the British Medical Association. 



II. " Experimental Researches into the Functions of the 

 Cerebellum." By J. S. RISIEN RUSSELL, M.D., M.R.C.P., 

 Assistant Physician to the Metropolitan Hospital. Com- 

 municated by Professor VICTOR HORSLEY, F.R.S. Received 

 December 14, 1893. 



(From the Pathological Laboratory of University College, London.) 

 (Abstract.) 



The views that have been expressed as to the probable functions of 

 the cerebellum are briefly alluded to, and the results obtained by 

 previous investigators, as the direct outcome of experimentation, are 

 detailed at greater length. 



The objects of the present research were to determine : 



1. Whether each lateral half of the cerebellum is capable of acting 

 independently, or whether it is necessary for the connexions between 

 the two halves to be intact, in order that the functions of the organ 

 should be properly performed. 



2. If impulses pass from one side of the organ to the other before 

 they are transmitted to the cerebrum or spinal cord. 



3. What is the nature of the impairment of movement which re- 

 sults when portions of the organ are removed. 



4. What relationship exists between one half of the cerebellum 



