VARIATION IN BODY WEIGHT 



113 



TABLE 66 



Giving the number of animals used by Ferry, ('IS) in computing her growth table 65, 

 for the rats at the Connecticut Agricultural Experiment Station in New Haven. 

 (Personal Communication). 

 In both groups the maximum number of observations was made at SO days of age 



TABLE 67 



Giving the increase in body weight with age — stock Albinos. Mean of two series — 

 King (MS '15) and giving also the coefficients of variation with their probable er- 

 rors. The Wistar Institute Colony. See graph C, Charts t and S, and Chart 4. 



