EFFECTS OF INBREEDING AIKTD CROSSBREEDING. 



61 



The percentage raised to 33 days of the young horn alive in the different inbred 

 families. 



Table 10. 



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



Fam- 



Size of litter, 1906-1910. 



Index. 



Size of Utter, 1911-1915. 



In- 



ily. 



1 



2 



3 



4 



5 



6 



1 



2 



3 



4 



5 



6 



dex. 



1.... 



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 



Per 



c't. 



80.0 



90.9 



81.6 



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 



8.5.5 



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 



Per 

 c't. 



"'so.'o' 



76.9 



88.9 

 41.2 

 68.4 

 81.8 

 100.0 



79.3 



89.0 

 89.1 

 86.2 

 89.7 

 86.1 

 90.5 

 90.6 

 90.7 

 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 



Per 



c't. 

 T2.7 

 97.0 

 62.5 

 80.0 

 76.2 

 84.6 

 78.9 

 100.0 



"89." 8' 

 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. 



Per 

 c't. 



Per 

 c't. 



77.1 



2.... 



3.... 



7 



9.... 



11 



13.... 

 14 



89.8 

 83.3 

 80.9 

 87.0 

 65.6 

 85.6 

 78.9 



65.5 

 100.0 

 80.0 

 66.7 

 63.6 

 66.0 



"si.'s' 



53.3 

 60.0 

 88.2 



89.3 

 76.1 

 87.0 

 84.3 

 76.2 

 86.2 

 80.4 



15 









17.... 

 18.... 

 19.... 

 20.... 

 21.... 

 23.... 

 24.... 

 31.... 

 32.... 

 34.... 

 35.... 

 36.... 

 38.... 

 39 



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 



90.9 



77.8 



"90.' 9' 



"87." 5' 

 90.9 

 60.0 

 100.0 



"n.l' 



70.4 

 60.0 



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 



40.0 

 93.8 

 6.5.0 

 80.0 



100.0 

 74.1 

 87.5 

 73.7 

 58.8 



100.0 

 79.2 

 88.9 

 62.5 

 68.9 



60.0 

 0.0 

 54.5 



"68.'6' 

 0.0 



"eo.'o" 



90.0 

 66.7 



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 











Table II. — The percentage raised to 33 days of all young {horn dead or alive) in the differ- 

 ent inbred families. 



[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 Utter 



, 1911- 



1915. 







Fam- 















Index. 















In- 



ilv. 



























dex. 





1 



2 



3 



4 



5 



6 





1 



2 



3 



4 



5 



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... 



8L8 

 72.7 



6L5 



75.0 



82.2 

 75.0 



58.3 

 66.2 



100.0 

 88.6 



"m.Y 



71.2 



73.0 



50.0 

 78.6 



77.3 

 8L9 



66.7 

 72.7 









66.6 



2... 



68.8 



47.5 





75.3 



3... 



69.2 



67.1 



77.0 



72.4 



75.0 



33.3 



72.3 



52.6 



65.0 



6L6 



41.7 



20.0 



0.0 



57.7 



7... 



7L4 



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 



74.6 



67.6 



4.3.3 



74.2 



64.7 



71.0 



67.9 



43.8 



3L1 



50.0 



63.7 



13... 



57.9 



78.2 



84.2 



82.2 



73.0 



60.0 



79.4 



71.4 



72.4 



81.6 



73.0 



5L7 



83.3 



76.1 



14 



68.4 

 83.3 

 92.0 



73.2 

 71.4 

 9L3 



80.5 

 69.3 

 90.4 



75.0 

 68.8 

 89.5 



75.6 



0.0 



82.8 



33.3 

 "55." 6' 



76.0 

 71.2 

 90.7 



83.3 

 "74.' 6' 



76.2 

 50.0 



82.5 



56.4 

 33.3 

 80.1 



53.6 







64.2 



15 









17... 



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 



8L8 



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 



2;^... 



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 



9L7 



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 



9L1 



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 



50.0 



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 



