SYMPATHETIC CELLS: NORWAY RAT BB 
A study of table 12 gives a clear idea of the quantitative dif- 
ference in growth between these two forms, and the same data 
are represented by graphs in chart 5. From the chart it is 
evident that the diameters of the cell body in the Biot ays are 
consistently below those in the standards. 
The data for these two strains have been compared also on body 
length, on age, and on the percentage of water in the brain and 
by all of these methods of comparison show relations essentially 
like those just presented. Thus, no matter what the basis of 
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Chart 5. Based on table 12 giving the diameters of the cells and their nuclei 
on body weight in the Norway rat compared with the standard albino. 
Norway 4—A Albino O—O 
comparison, these cells in the Norways are smaller than those 
in the standards. 
In order to compare with the standards the inbreds as well 
as the Norways, a series of data, selected from the previous re- 
cords, have been assembled in table 13. 
An examination of table 13 brings to light several interesting 
relations. While in five out of the six instances the diameters 
of the nuclei are similar, there is nevertheless a great difference 
in the diameters of the cells according to strain. The differences 
therefore appear mainly in the cytoplasm. As compared with 
the standards, the inbred cells are small, while the cells of the 
Norways, though also small, differ much less. 
