22 



CHARLES A. CDBURN 



TABLE 10 

 Summary of Results for Second Generation Hybrids, F^, of Series B 



Average number tests, 

 Range of tests, 3-5 

 Average age in days: 



First 

 test, 41.95 



Last test, 87.64 



115 Fab Males 



Average number tests, 

 Range of tests, 2-5 

 Average age in days: 



First 



test, 39.40 



Last test, 86.67 



118 Fab 

 Females 



4.97 

 First test. 



Average 1 and 2. . . 



Average all 



Average 3, 4 and 5 

 Last test 



4.93 

 First test. 



Average 1 and 2. . . . 



Average all 



(117) 



Average 3, 4 and 5 . 



Last test 



WILDNESS 



Distribution of mice 

 in grades: 



3.86 



3.61 



3.12 

 2.93 



3.93 



3.90 



3. 



3.53 

 3.31 



27 



53 



29 



SAVAGENESS 



Distribution of mice 

 in grades: 



Av. 



4.06 



3.95 



3.24 

 2.71 

 2.00 



4.35 



4.22 



3.70 



3.55 

 2.94 



27 



2>3, 



51 



TABLE 11 

 Summary of Results for Third Generation Hybrids, Fz, of Series B 



Average number tests, 4.65 



Range of tests, 2-5 

 Average age in days: 



First 

 test, 41.13 



Last test, 80.17 



23 Fsb 

 Males 



First test. 



Average 1 and 2. . . 



Average all 



(22) 



Average 3, 4 and 5 



Last test 



Average number tests, 4.74 

 Range of tests, 2-5 First test 

 Average age in days: 

 First 



test, 41.11 

 Last 



test, 83.00 

 27 Fab 

 Females 



Average 1 and 2. 



Average all 



(26) 



Average 3, 4 and 5 



Last test 



SAVAGENESS 



16 



11 



5 



6 



8 



18 



12 



7 



5 

 7 



