WEIGHTS OF ORGANS IN UNDERFED YOUNG RATS 



101 



TABLE 1 

 Lilters used in experimenls 



As noted in this table, three of the litters are from the rat 

 colony at the University of Missouri, and the remainder from a 

 local colony at the University of Minnesota. There are in- 

 cluded twenty-nine males and thirty-six females, a total of sixty- 

 five. In addition, two rats not listed in tables 1 and 2 were 

 used as additional controls at three weeks in the study of the 

 skeleton (table 7). 



In most cases, the experiment began when the rats were three 

 weeks of age (time of weaning). These rats were held at con- 



