BLOOD 



71 



Size. The diameter of the erythrocytes (White, '01) is given 

 in table 35. 



In the course of development the diameter of the erythrocytes 

 decreases up to puberty. The observations of Jolly ('23) are 

 given in table 35 A. 



TABLE 35 



FOR M. DECUMANUS 



DIAMETERS IN ft, 



Determination by (Treadwell) 6.5 



Determination by (Wormley, 1888) 7.0 



Determination by (Gulliver, 1875) 6.5 



TABLE 35A 

 Diameters of erythrocytes at successive ages up to three months 



A'.K DIAMETER /J. 



17th days of gestation 9.7 



1 day 8.3 



8 days 8.'0 



15 days 7.9 



30 days 6.7 



90 days 6.6 



TABLE 36 



Showing the percentage and size of the various forms of the wandering cells of the 



blood in the rat 



TYPE OF CELL GRANULATION PERCENTAGE OF TYPE DIAMETERS IN ft. 



\ Coarse 2 10 

 ^ F . ne 



Basophile (absent) 



Hyaline 2 8-10 



Lymphocytes 50 6 



For the wandering cells there are data from Kanthack and 

 Hardy ('94J tables 36 and 37. 



Blood picture. Rivas (MS. '14) examined ten normal full 

 grown rats using Miescher's method for the hemoglobin and 

 Wright's stain for the cells. The blood was taken near the 

 tip of the tail and spreads made. His results, somewhat con- 

 densed, are given in table 38. 



