NERVOUS SYSTEM 



77 



Linear dimensions. The changes in the several diameters of 

 the fresh cerebrum with increasing brain weight have been 

 determined by Sugita ('17). 



TABLE 44 

 Showing the number of mitoses per cubic millimeter of nerve tissue in the central 

 nervous system of the stock Albino at certain levels. The figures give the number 

 of mitoses in ten consecutive sections at each level of the cord, in five in the 

 largest portion of the cerebellum and in five in the cerebrum in the region of the 

 optic chiasma. The letters (a) (b) and (c) refer to different rats of the same age. 



The measurements were made with calipers along the lines 

 indicated in figure 3 and 3 (a). 



Fig. 3 



Fig. 3. Dorsal view of the albino rat brain weighing 1.5 grams. Enlarged 

 1.8 diameters. To show the positions at which the two measurements for the 

 width and the two measurements for the length were taken. AB = Width W.B, 

 CD = Width W.D, EF = Length L.F and EG = Length L.G. 



Fig. 3 a Lateral view of the albino rat brain weighing 1.5 grams. Enlarged 

 1.8 diameters. To show the position at which the height was measured. HK = 

 Height Ht. 



