234 ROBERT S. ELLIS 



case of paresis was sectioned before the cause of death was known, 

 and it seemed desirable to include it as an example of what may 

 happen in this disease. It is from a white man who was of 

 average physique and who died at the age of thirty-three years. 

 The data are given in table 6. 



In the course of this investigation careful counts have been 

 made on parts of about forty cerebella and sections from about 

 twenty-five others have been less carefully examined. The 

 twenty-five cases on which the figures given in this paper are 

 based are believed to be typical of the classes under which they 

 are listed. 



PREPARATION OF MATERIAL 



The cerebellum was removed from these brains, weighed, and 

 the weight in grams recorded. In cases where the specific 

 gravity had changed materially from being for several years in 

 alcohol, the specific gravity was determined and the brain weight 

 was corrected to the normal weight for a cerebellum of that 

 volume. No change of consequence was observed in the specific 

 gravity of those cerebella which had been preserved in formalin. 

 Consequently, no corrections were made on the weights as taken. 



After weighing, three' blocks were taken from each cerebellum. 

 The entire vermis was removed and cut so that a sagittal section 

 could be made of it entire. Then blocks were cut which would 

 give sections nearly through the middle of each hemisphere and 

 at right angles to practically all the folia. The plane of these 

 was so selected as to cut the lobus biventer, or paramedianus 

 (Bolk) , on the under surface, to pass through the dentate nucleus, 

 and to cut the anterior dorsal edge of the hemisphere near the 

 vermis. A section so made shows for comparative purposes 

 the areas of each hemisphere to which different functions have 

 been assigned by Bolk ('05), Rynberk ('07, '12), et al. 



Figure 1 shows the plane in which the sections were taken, 

 and figure 2 the appearance of such a section and gives the 

 localization pattern advanced by the above writers. 



The blocks of hardened tissue were cut about 5 mm. thick. 

 Their maximum length and maximum breadth were then meas- 



