46 CHESTER A. STEWART. 



In the adult rats the kidneys in both test animals and controls 

 were close to Donaldson's norm. It is evident therefore that the 

 kidneys were practically normal in weight, both at the end of the 

 fasting period, and throughout the period of refeeding. 



21. Testes and Epididymi (Table F.). 



On account of the small number of observations, conclusions 

 concerning the testes and epididy<Tii are rather unsatisfactory 

 during the early periods of refeeding. As compared with 

 Donaldson's norm, the testes appear to be constantly below 

 normal weight, especially at the end of the maintenance period 

 (contrary to the observations of Jackson). In the adult rats, 

 however, these glands are practically normal as compared with 

 the controls. 



The epididymi are not included with the testes in Table V. 

 Their relative weight (.092 per cent, of net body weight) in the 

 male rat killed at the end of nine weeks of maintenance, was 

 close to the average given by Jackson ('15) for the normal at 

 three weeks (.084 per cent.) and in rats held at maintenance for 

 seven weeks (.080 per cent.). At the end of four weeks of refeed- 

 ing the relative weight of the epididymi (.12 per cent.) the net 

 body weight being 117.4 grams, appears to be unusually low. 

 In the adult rats the relative weight of the epididymi averaged 

 .27 per cent, in the controls and .21 per cent, in the test animals. 



On account of the great normal variability in the weight of 

 both testis and epididymis, and the small number of observations, 

 no conclusions can be drawn with any degree of certainty. 

 However, the evidence indicates that the testes and epididymi 

 were somewhat below normal weight during the early refeeding 

 periods, but practically normal in the adult animals. 



22. Ovaries (Table F.) 



The ovaries were practically normal as compared with Donald- 

 son's norm in the female rat at the end of the underfeeding period. 

 Jackson ('15) noted an apparent decrease in the weight of the 

 ovary during maintenance. 



On refeeding, the ovaries were below Donaldson's norm (minus 

 1 1. 6 per cent.) at the end of the first half-week, but exceeded it 



