BOL CHI PING 
gains in these cells are of the same order in the Norways as in 
the standards—21 per cent and 26 per cent, respectively, for 
the cell body. The two strains are therefore similar in this 
character. Second, that this order of enlargement is, on the 
one hand, similar to that found for the large motor cells in the 
spinal cord, and, on the other, very different from that found for 
the corresponding spinal ganglion cells. This later relation 
indicates that the sympathetic ganglion cells, which are efferent 
in function, behave like motor cord cells during their later growth. 
TABLE 12 
Comparing, according to body weight, the average diameters of the cells and nuclei 
in the swperior cervical sympathetic ganglion of the Norway with that of the stand- 
ards. The data for the Norway rat are condensed from table 2, and for the Albino 
from table 2 of the former study (Ping, ’21). Sexes combined 
ALBINO RAT : NORWAY RAT 
Body weight Nucleus Cell Cell Nucleus Body weight 
grams ye a Le ia grams 
6 10.8 19.7 16.8 9.7 6 
15 113351) 2557 22.6 127 14 
31 12RD 25.0 23.9 12.4 BY 
53 118357 Die, 24.3 ea 51 
73 ils} 7 29.2 25.8 13.0 74 
106 13.6 29.8 25.7 13.0 103 
151 11832 28.9 Zie2 13.3 157 
178 13H0 30.5 Dee? ifs}, i 189 
Average .. 12.8 27.0 24.2 1245 
Percentage difference in cell diameter = 11 per cent 
Percentage difference in nucleus diameter = 3 per cent 
D. Absolute size of cells at different ages 
E. Nucleus-plasma_ ratios 
In the first instance we shall take up cell size alone and limit 
the comparison to that of the Norways to the standards. 
In table 12 the mean diameters of the cells and nuclei of the 
standards and Norways are arranged according to their respective 
body weights, the former data being from table 2 of my previous 
paper, the latter from the foregoing table 2 of the present paper. 
