146 



CM. JACKSON 



constant body-weight there is a sHght tendency to increase in 

 the weight of the kidneys, in the earher weeks, but httle or no 

 apparent difference later. 



In adult rats during acute and chronic inanition, the kidneys 

 lose in weight relatively slightly less than the body as a 

 whole, thereby gaining slightly in relative (percentage) weight 

 (Jackson '15 c). 



TESTES AND EPIDIDITMI 



The weights of testes and epididymi unfortunately were not 

 separated in some cases, which (together with their variabihty 

 and the small number of observations) makes conclusions some- 

 what difficult. For the testis (table 22 a), the clearest case is 

 in rats held constant from three to ten weeks of age, in which 



TABLE 22 



The testes and epididymi; average absolute weight, average percentage of net body-weight 



and range indicated 



DESCRIPTION OP RATS 



o z 



absolute weight 

 (and range): grams 



relative weight 

 (and range) : 



PER CENT 



a. Testes 



Normal at 3 weeks (Hatai '13) 



Normal at 3 weeks (incl. epididymi) (Jackson '13) 



Controls at 3 weeks 



Body-weight constant 3 weelis (age ot 3 to 6 weeks) 

 Body-weight constant 5 weeks (age of 3 to 8 weeks) 

 Bodj'-weight constant 7 weeks (age of 3 to 10 weeks) 



Normal at 6 weeks (Hatai '13) 



Normal at 6 weeks (Jackson '13) 



Body-weight constant 26 weeks (age of 6 to 32 weeks) 



Normal at 10 weeks (Hatai '13) 



Normal at 10 weeks (Jackson '13 ) 



Controls at 10 weeks 



Body-weight constant 25 weeks (age of 10 to 35 weeks) 

 Controls at 32 and 35 weeks 



b. Epididymi 



Normal at 3 weeks (Jackson '13) (estim 



Controls at,3 weeks 



Body-weight constant 3 weeks (age of 3 to 6 weeks) 

 Body- weight constant 7 weeks fage of 3 to 10 weeks) 

 Controls at 10 weeks 



* Gross body-weight, 

 t Including epididymi. 



ated) 

 6 

 1 



3 



20.0* 



21.2 



25.0 



22.1 



18.1 



25.2 



50,0* 



4f).0 



43.7 



70.0* 



117.0 



154.7 



79.6 



218.7 



20.0 

 25.0 

 23. G 

 25.2 

 154,7 



0.090 



0.134t 



0.144 



0.133t 



0.176t 



0,193 



0,402 



0,592t 



0.370t 



0,774 



1.747t 



1.850 



1.294t 



1.844t 



(0.07e- 

 (0.114 

 (0.129 



•0.224) 

 -0.200) 

 -0.137) 



(0,106-0.331) 



(0.3GS-0.958) 



(0.678- 

 (1.608- 

 (1.401- 

 (1.766 



-2.62) 

 -2.10) 

 ■1,188) 

 -1.932) 



0.45 



0.63* (0.53-0, 



0.57 (0.49-0. 



0.66* (0.65-0 



0.98* 



0.74 ra.49-1. 



0.80 



1,19* (0.88-1, 



0.84* 



1 11 



1.51* (0.€3-2 



1.21* (1.06-1 



1.62* (1.61-1 



0.84* (0.74-0. 



62) 

 67) 



05) 



72) 



41) 

 49) 

 ,64) 

 90) 



0.200 (?) 



0.0209 (0.0092-0.0246 



0.0144 



0.0209 (0.0084-0.0360) 



0.4700(0.4480-0.4920 



0.10 (?) 



0.084 (0.039-0.123) 



0.061 



0.080 (0.040-0.115) 



0.310 (0.290-0.330) 



