ULTIMATE EFFECTS OF INANITION ON SIZE 119 



refeeding to a body weight of 25 to 75 grams, Jackson and Stew- 

 art ('19) found no excess, but rather a slight deficit ( — 5.7 to 

 — 15.4 per cent) in the musculature of the rats underfed to six 

 or ten w^eeks. This indication that early inanition may exert 

 a retarding effect on the later growth of the musculature is to a 

 certain extent supported by the present data for such rats refed 

 to maximum body weight. As shown in table 2, there is a 

 slight underweight (—4.1 to —10.3 per cent) in all except the 

 third group, which instead averages 5.8 per cent above normal. 

 These differences are so slight that their significance is somewhat 

 doubtful, though a negative tendency is apparent. 



Visceral group and remainder. The visceral group, which in- 

 cludes all the individual organs listed in table 2, is found 28 to 38 

 per cent above normal weight in young rats underfed from birth 

 to three, six, or ten weeks of age (Stewart, '18). Jackson and 

 Stewart ('19) found the group as a whole nearly normal in weight 

 when such rats were amply refed to a body weight of 25 to 75 

 grams. The present data (table 2) show the visceral group 

 slightly above normal weight (-H3.6to +13.2 per cent) in all but 

 the last column (—3.8 per cent). There are differences in the 

 individual .organs, however, as will be discussed later. 



The 'remainder' is obtained by deducting from the net body 

 weight (intestinal contents excluded) the weight of the integu- 

 ment, skeleton, musculature, and visceral group. This 're- 

 mainder' includes various small, unweighed organs, dissectible 

 fat, body fluids, loss by evaporation, etc. In rats underfed from 

 birth to three, six, or ten weeks, Stewart ('18) found a marked 

 loss ( — 19 to —40 per cent) in the weight of the 'remainder.' 

 No constant or significant variations from the normal occurred in 

 such rats amply refed to a body weight of 25 to 75 grams (Jack- 

 son and Stewart, '19). In the present series, the 'remainder' 

 is considerably above normal in the refed rats which had been 

 underfed from birth, but below normal weight in those underfed 

 beginning at three weeks of age (table 2) . The interpretation is 

 doubtful, as the 'remainder' is exceedingly variable even under 

 normal conditions. 



