46 



CHARLES A. COBURN 



that of groups of mice as in the preceding sections. The results 

 of the inheritance of the offspring from selected matings are 

 included in the results of the general matings in order to give 

 better opportunity for comparison than could otherwise be 

 obtained. 



TABLE 32 



Summary of Results of Second Generation Hybrids, F2, of Series B,from Matings of Parental 

 Generation, Wild Female with Tame Male 



Average number tests, 5 

 Range of tests, 5 

 Average age in days : 

 First test, 39.96 

 Last test, 80.23 



25 Fab Males 

 and Females 



Average number tests, 5 

 Range of tests, 5 

 Average age in days: 

 First test, 38.61 

 Last test, 77.15 



13F2b 

 Males 



Average number tests, 5 

 Range of tests, 5 

 Average age in days : 

 First test, 41.41 

 Last test, 87.91 



12 Fab 

 Females 



First test 



Average 1 and 2. . 



Average all 



Average 3, 



4 and 5 



Last test 



First test 



Average 1 and 2. . 



Average all 



Average 3, 



4 and 5 



Last test 



First test 



Average 1 and 2 . . 



Average all 



Average 3, 4 



and 5 



Last test 



Distribution of mice 

 in grades: 



Av. 



3.28 



3.4 



2.92 



2.6 

 2.28 



3.3 



3.21 



2.66 



2.3 

 1.76 



3.25 



3.62 



3.2 



2.91 

 2.83 



1 



SAVAGENESS 



Distribution of mice 

 in grades: 



Av. 



3.36 



3.84 



3.2 



2.77 

 2.04 



3.84 



3.8 



2.95 



2.38 

 1.46 



3.66 



3.87 



3.46 



3.19 

 2.66 



To show to best advantage the individual inheritance, the 

 results of the averages of the third, fourth, and fifth tests have 

 been arbitrarily chosen as the criteria and the six grades, to 

 5, have been divided into two equal parts. All mice which 

 received as an average of their third, fourth and fifth tests, 

 grades not exceeding 2.4 are considered tame and non-savage. 

 Those whose averages of these tests were equal to or between 



