96 "COEFFICIENT OF DIFFUSION OF CELLS" 



incubated at 37 C. for 10 minutes, when it will be 

 seen that the nuclei of the lymphocytes have turned 

 scarlet. 



Lymphocytes 



In this specimen the neutrophile leukocytes will 

 have burst, for the jelly has an index of diffusion too 

 high for them by 2 units their cf being 12. For 

 the same reason the eosinophile cells will also be achro- 

 matic, and the same may be said of the basophile cell, 

 although it is very difficult to stain the nuclei of these 

 cells. Their of, however, is about the same as that of 

 the neutrophile leucocyte. 



The simple equation has other advantages. It can 

 be inverted, so to speak, and the units of the different 

 factors can replace each other to some extent; for since 

 the units of the several factors are equal to one another 

 as regards their power of increasing or decreasing the 

 diffusion, one can interchange them at will. We can 

 make two jellies, for instance, one of which contains 

 5 units of stain and 2 of alkali; and another which 

 contains 2 units of stain and 5 of alkali; and provided 

 the other factors are the same in the films made from 

 each tube, the result obtained by each jelly will be 

 identical. The equations will both give the same 

 total : 



=9. 

 cf = (2s + 5a + 4/z, + 2<) - (3c + n) =9. 



Any of the factors may thus be interchanged. 



We may delay this diffusion by adding more units 



