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 



Determination by (Treadwell) 



Determination by (Wormley, 1888) . 

 Determination by (Gulliver, 1875) . 



DIAMETERS IN /i 



6.5 

 7.0 

 6.5 



TABLE 35a 

 Diameters of erythrocytes at successive ages up to three months 



17th days of gestation. 



1 day 



8 days 



15 days 



30 days 



90 days 



DIAMETER fi 



9.7 

 8.3 

 8.0 

 7.9 

 6.7 

 6.6 



TABLE 36 

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



blood in the rat 



For the wandering cells there are data from Kanthack and 

 Hardy ('94) 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. 



