EFFECTS OF INBREEDING ASTD CROSSBREEDING. 



61 



Table 10.— The percentage raised to 33 days of the young born alive in the different inbred 



families. 



[The average in litters of each size and the index (see Table 9), 1906 to 1910 and 1911 to 1916.] 



Fam- 

 ily. 



Per 

 c't. 

 81.8 



100.0 

 90.0 

 83.3 



100.0 

 83.3 

 73.3 

 81.2 



100.0 

 95.8 

 66.7 



100.0 

 94.1 

 75.0 

 88.9 

 85.0 

 88.9 

 97.6 



100.0 

 78.9 



100.0 

 82.9 

 90.0 



Size of litter, 1906-1910. 



Per 

 c't. 



80.0 

 90.9 

 84.6 

 85.0 

 89.5 

 80.2 

 88.1 

 90.9 

 90.9 

 96.0 

 94.6 

 88.2 

 86.4 

 95.4 

 88.9 

 92.3 

 94.8 

 88.6 

 86.8 

 89.4 

 93.9 

 93.1 

 86.7 



Per 



c't. 



86.0 



85.1 



92.0 



86.0 



88.1 



90.0 



95.1 



92.5 



89.6 



97.7 



90.0 



93.1 



90.2 



87.3 



73.3 



92.5 



91.1 



91.5 



97.6 



87.1 



88.0 



94.5 



97.7 



Per 



c't. 



63.6 



88.3 



89.4 



89.7 



88.2 



88.3 



93.3 



91.0 



88.0 



97.1 



85.5 



97.0 



83.9 



79.4 



90.5 



90.2 



89.5 



86-4 



93.3 



92.8 



86.8 



85.9 



83.3 



Per 

 c't. 

 100.0 

 93.9 

 78.9 

 71.8 

 79.4 

 86.6 

 85.5 

 91.9 



83.6 

 88.9 

 69.6 

 94.4 

 85.7 

 83.9 

 91.8 

 88.0 

 81.2 

 80.0 

 90.0 

 84.9 

 84.6 



Per 

 c't. 



80.0 

 76.9 

 88.9 

 41.2 

 68.4 

 81.8 

 100.0 



90.9 

 77.8 



90.9 



87.5 

 90.9 

 60.0 

 100.0 



71.4 

 70.4 

 60.0 



Index 



79.3 



89.0 



89.1 



86.2 



89.7 | 



86.1 i 



90.5 



90.6 | 



90.7 i 

 96.9 

 88.2 

 93.1 

 88.2 

 86.9 

 83.0 

 91.2 

 91.7 

 90.2 

 93.7 

 88.1 

 90.7 

 92.2 

 90.8 



Size of litter, 1911-19U 



Per 



c't. 

 72. 7 

 97.0 

 62.5 

 80.0 

 76.2 

 84.6 

 78.9 

 100.0 



87.5 

 68.2 

 91.3 

 91.9 

 87.9 

 78.8 

 90.9 

 85.1 

 86.7 

 80.0 

 78.3 

 81.8 

 77.1 



Per 

 c't. 

 81.0 

 90.6 

 78.0 

 90.2 

 89.7 

 79.4 

 82.8 

 84.2 

 100.0 

 88.1 

 91.5 

 77.3 

 91.3 

 91.1 

 73.2 

 79.5 

 87.1 

 85.8 

 73.2 

 88.9 

 86.7 

 84.5 

 92.4 



Per 



c't. 

 77.8 

 86.2 

 74.4 

 89.5 

 81.0 

 76.9 

 90.8 

 73.3 

 50.0 

 89.6 

 76.4 

 91.6 

 87.0 

 87.5 

 81.8 

 76.3 

 91.0 

 85.4 

 86.7 

 87.3 

 83.2 

 80.5 

 85.5 



Per 

 c't. 



89. 8 

 83.3 

 80.9 

 87.0 

 65.6 

 85.6 

 78.9 



76.2 

 72.5 

 73.2 

 87.5 

 82.6 

 78.8 

 74.5 

 83.3 

 73.0 

 84.1 

 81.2 

 78.7 

 81.5 

 70.8 



Per 



c't. 



65.5 

 100.0 

 80.0 

 66.7 

 63.6 

 66.0 



40.0 

 93.8 

 65.0 

 80.0 



100.0 

 74.1 

 87.5 

 73.7 

 58.8 



100.0 

 79.2 

 88.9 

 62.5 

 68.9 



Per 

 c't. 



In- 

 dex. 



81.8 

 53.3 

 60.0 

 88.2 



60.0 

 0.0 

 54.5 



68.0 

 0.0 



60.0 

 90.0 

 66.7 



77.1 

 89.3 

 76.1 

 87.0 

 84.3 

 76.2 

 86.2 

 80.4 



86.5 

 81.3 

 81.3 

 88.8 

 88.0 

 79.2 

 77.2 

 88.2 

 83.0 

 82.1 

 85.8 

 83.1 

 82.0 

 83.8 



The percentage raised to 38 days of all young {born dead or alive) in the differ- 

 ent inbred families. 



Table 11. 



[The average in litters of each size and the index (see Table 9), 1906 to 1910 and 1911 to 1915.] 







Size of Utter 



1906-1910. 









Size of litter 



, 1911- 



1915. 







Fam- 















Index. 















In- 



ily. 



























dex. 





1 



2 



3 



4 



5 



6 





1 



2 



3 



4 







6 







Per 



Per 



Per ' 



Per 



Per 



Per 





Per 



Per 



Per 



Per 



Per 



Per 







c't. 



c't. 



c't. \ 



c't. 



c't. 



c't. 





c't. 



c't. 



c't. 



c't. 



c't. 



c't. 





1 



81.8 



61.5 



82.2 i 



58.3 



100.0 





71.2 



50.0 



77.3 



66.7 









66.6 



2 



72.7 



75.0 



75.0 | 



66.2 



88.6 



66.7 



73.0 



78.6 



81.9 



72.7 



68.8 



47.5 





75.3 



3.... 



69.2 



67.1 



77.0 1 



72.4 



75.0 



33.3 



72.3 



52.6 



65.0 



61.6 



41.7 



20.0 



0.0 



57.7 



7.... 



71.4 



72.3 



75.4 : 



69.1 



50.9 



44.4 



72.8 



65.3 



75.4 



72.8 



67.4 



58.2 



50.0 



71.8 



9 



84.6 



81.0 



74.7 



72.1 



67.5 



38.9 



77.1 



61.5 



76.1 



63.8 



72.5 



51.4 



26.7 



69.0 



11 



58.8 



72.2 



79.4 j 



74.6 



67.6 



43.3 



74.2 



64.7 



71.0 



67.9 



43.8 



31.1 



50.0 



63.7 



13 



57.9 



78.2 



84.2 ! 



82.2 



73.5 



60.0 



79.4 



71.4 



72.4 



81.6 



73.0 



51.7 



83.3 



76.1 



14 



68.4 



73.2 



80.5 



75.0 



75.6 



33.3 



76.0 



83.3 



76.2 



56.4 



53. tt 







64.2 



15 



83.3 



71.4 



69.3 



68.8 



0.0 





71.2 





50.0 



33.3 











17 



92.0 



91.3 



90.4 l 



89.5 



82.8 



55.6 



90.7 



74.6 



82.5 



80.1 



63.2 



20.0 



50.0 



76.9 



18.... 



57.1 



85.5 



87.1 ! 



81.9 



68.6 



70:0 



82.6 



65.6 



82.6 



70.3 



63.0 



50.0 



0.0 



72.1 



19 



90.9 



68.2 



81.8 ' 



82.5 



64.0 





78.8 



62.5 



72.8 



70.7 



44.6 



52.0 



33.3 



65.3 



20.... 



80.0 



72.8 



77.1 ' 



72.2 



85.0 



55.6 



75.1 



77.8 



77.9 



77.6 



81.7 



66.7 





78.5 



21.... 



75.0 



84.0 



79.7 



75.0 



60.0 





79.6 



69.4 



75.4 



75.0 



59.4 



10.0 





71.4 



23.... 



72.7 



85.6 



68.8 



86.4 



74.3 



58.3 



77.8 



70.7 



63.8 



76.7 



73.2 



66.7 





71.5 



24.... 



73.9 



83.1 



82.6 



76.7 



71.8 



83.3 



80.7 



53.1 



60.0 



63.2 



58.3 



35.0 





60.3 



31.... 



84.2 



91.7 



85.2 



83.9 



62.8 



25.0 



86.8 



60.6 



78.2 



71.2 



75.9 



70.0 



56.7 



73.2 



32.... 



93.0 



82.1 



82.9 ; 



73.4 



58.5 



66.7 



81.8 



80.0 



73.3 



76.6 



51.9 



33.3 



0.0 



71.0 



34.... 



50.0 



82.5 



91.1 ! 



87.5 



60.0 





83.7 



65.0 



66.1 



78.8 



71.2 



40.0 





72.1 



35. . . . 



65.2 



88.4 



81.3 



69.6 



54.0 



50.0 



79.5 



57.1 



80.0 



80.1 



67.6 



50.7 



27.8 



75.3 



36 



93.3 



88.6 



76.5 



67.6 



69.5 



63.3 



80.0 



72.0 



79.4 



73.1 



58.3 



53.3 



SO.O 



71.9 



38.... 



86.7 



87.1 



91.7 



72.6 



73.3 



50.0 



86.0 



72.0 



78.9 



74.6 



63.1 



33.3 



33.3 



73.3 



39.... 



81.8 



81.2 



82.4 ! 



71.4 



0.0 



0.0 



79.8 



73.0 



86.8 



78.5 



60.8 



44.3 





76.9 



