VISCERA 



123 



determined by Morgulis ('11). The organs were fixed in Zen- 

 ker's solution and imbedded in paraffin and were taken from 

 one normal Albino — 110 days old; body length 176 mm., body 

 weight, 137.7 grams — table 84. 



TABLE 85 



Volumetric data for the kidney of the albino rat at various ages. Zenker fixation; 



Paraffin imbedding; Stain, haematoxylin and eosin 



M. 



M. 

 F. 

 M. 

 F. 

 M. 



VOLUME OP 



MEDULLA 



IN ONE 



KIDNEY- 



cu. tni7i. 



3.25 



6.57 



14.72 



30.59 



41.35 



106.61 



130.26 



VOLUME OP 



CORTEX IN 



ONE 



KIDNEY 



9.92 



19.13 



29.79 



45.76 



90.43 



219.09 



374.44 



TOT.\L NUMBER 



OF RENAL 



CORPUSCLES IN 



ONE KIDNEY 



15,533* 



10,465t 



26,598* 



19,682t 



24,061 



25,930 



28,583 



28,863 



28, 000 t 



AVERAGE 

 DIAMETER 



CORPUSCLES 



62 

 52 



53 

 61 



79 



95 



127 



* Including renal corpuscles still in stages of formation. 



t Including only fully formed corpuscles. 



J Estimated approximately from the three preceding cases. 



Pulmonary system. (See References: also table 146.) Miller 

 ('19) MS. has noted the absence of cartilage in the bronchi of 

 the rat. 



10. Uro-genital system. See References : also tables 145, 146, 

 149 and 150. 



Kidneys. Kittelson ('17) has examined the volumetric rela- 

 tions of the kidney at different ages, and also determined the 

 number of renal corpuscles — table 85. 



