EFFECTS OF INBREEDIlSTG AND CROSSBEEEDHSTG. 



57 



Table 28.— Indices and averages showing the estimated record of the total inbred stock during 

 the period in which each experiment was in progress. 



Experi- 

 ment. 



Per 

 cent 

 born 

 alive. 



Per 

 cent 

 raised 



of 

 those 

 born 

 aUve. 



Per 



cent 



raised. 



Birth 

 weight, 

 total. 



Birth 

 weight 

 of those 

 raised. 



Gain 

 per 

 aay. 



Weight 

 at 33 



days. 



Size of 

 Utter. 



Litters 

 per 

 year. 



Young 

 per 

 year. 



Young 



raised 



per 



year. 



2 



79.3 

 79.5 

 78. () 

 79.1 

 76.6 

 74.3 



76.4 

 75.4 

 74.2 

 73.9 

 70.8 

 65.4 



60.6 

 60.7 

 58.4 

 59.2 

 54.4 

 49.7 



Grams. 

 73.5 

 73.6 

 72.6 

 72.9 

 71.2 

 69.0 



Grams. 

 78.8 

 78.9 

 78.3 

 78.0 

 77.3 

 75.0 



Grams. 

 3.81 

 3.79 

 3.72 

 3.74 

 3.54 

 3.28 



Grams. 

 204.6 

 203.9 

 201.0 

 201.4 

 194.2 

 183.2 



2.34 

 2.35 

 2.34 

 2.34 

 2.32 

 2.29 



3.27 

 3.23 

 3.24 

 3.27 

 3.17 

 3.03 



7.69 

 7.57 

 7.59 

 7.6S 

 7.34 

 6.93 



4.42' 



13 



4 21 



32 



35 



39 



Other 



4.24 

 4.40 

 3.85 

 3.30 



Inbred 



CO 



77.7 

 79.0 

 83.6 

 83.3 

 79.9 

 79.8 

 82.3 



72.1 

 74.1 

 83.0 

 83.2 

 72.6 

 73.5 

 78.9 



56.3 

 58.8 

 70.1 

 69.4 

 58.9 

 59.6 

 65.3 



71.8 

 71.0 

 77.9 

 78.2 

 70.0 

 71.2 

 74.8 



77.6 

 76.4 

 81.0 

 81.7 

 75.2 

 76.3 

 79.3 



3.84 

 3.64 

 4.02 

 4.12 

 3.71 

 3.77 

 4.10 



197.8 

 193.6 

 213.8 

 217.7 

 197.6 

 200.8 

 214.5 



2.33 

 2.31 

 2.41 

 2.41 

 2.27 

 2.29 

 2.33 



3.18 

 3.18 

 3.48 

 3.49 

 3.22 

 3.25 

 3.40 



7.40 

 7.35 

 8.42 

 8.45 

 7.31 

 7.46 

 7.96 



3.96 

 4.09 



CA 



5.42 



AC 



5.51 



CC 



4.17 



CI 



4.31 



C2 



4.94 







CL 



83.4 

 82.6 



83.3 

 81.9 



69.5 

 67.5 



78.2 

 77.4 



81.7 

 81.3 



4.10 

 4.10 



217.0 

 216.6 



2.42 

 2.40 



3.47 

 3.48 



8.38 

 8.39 



5.32 



CG 



5.32 







B 



78.4 



73.3 



58.2 



"■' 



77.3 



3.66 



198.0 



2.32 



3.22 



7.51 



4.19 







Table 29. — Indices and averages showing the record of each experiment during the portion 

 of the 4 years, 1916-1919, in which it was in progress. 



Experi- 

 ment. 



Per 

 cent 

 born 

 alive. 



Per 

 cent 

 raised 



of 

 those 

 born 

 alive. 



Per 



cent 

 raised. 



Birth 

 weight, 

 total. 



Birth 

 weight 



of 

 those 

 raised. 



Gain 

 per 



day. 



Weight 

 at 33 

 days. 



Size of 

 Litter. 



Litters 

 per 

 year. 



Young 

 per 

 year. 



Young 



raised 



per 



year. 



2 



75.6 

 78.2 

 80.8 

 79.8 

 81.0 

 75.4 



79.4 

 74.0 

 68.2 

 78.0 

 65.4 

 63.6 



60.3 

 58.0 

 56.1 

 62.4 

 54.0 

 48.1 



Grams. 

 66.6 

 76.1 

 74.3 

 77.1 

 67.9 

 70.9 



Grams. 

 72.7 

 83.7 

 78.9 

 81.6 

 73.3 

 76.2 



Grams. 

 3.10 

 4.29 

 3.73 

 4.18 

 3.50 

 3.30 



Grams. 

 175.1 

 225.2 

 201.9 

 219.6 

 189.1 

 185.0 



2.26 

 2.53 

 2.19 

 2.44 

 2.34 

 2.25 



3.70 

 3.23 

 3.29 

 3.59 

 2.90 

 2.67 



8.37 

 8.16 

 7.20 

 8.78 

 6.79 

 6.01 



5. 00- 



13 



4.30- 



32 



3.91 



35 



5.11 



39 



3.39 



Other 



2.80 



Inbred 



CO 



77.7 

 79.5 

 85.8 

 89.5 

 86.3 

 88.2 

 85.6 



72.1 

 84.8 

 91.7 

 91.4 

 84.5 

 82.5 

 85.5 



50.3 

 67. 8 

 78.8 

 81.7 

 73.1 

 73.0 

 73.4 



71.8 

 72.2 

 80.7 

 85.1 

 79.0 

 78.8 

 79.8 



77.6 

 78.3 

 83.9 

 88.3 

 82.1 

 81.7 

 82.9 



3.64 

 4.12 

 4.49 

 4.61 

 4.49 

 4.37 

 4.62 



197.8 

 214.2 

 232.1 

 240.5 

 230.3 

 225.8 

 235.5 



2.33 

 2.27 

 2.50 

 3.10 



2.59 

 2.53 

 2.43 



3.18 

 3.21 

 4.16 

 3.82 

 4.38 

 4.34 

 4.26 



7.40 

 7.28 

 10.41 

 11.85 

 11.36 

 10.96 

 10.34 



3.96 

 4.48 



CA 



7.99 



AC 



9.02 



CC 



7.61 



CI 



7.46 



C2 



7.10 







CL 



91.3 



86.9 



86.8 

 86.4 



79.2 

 75.3 



84.7 

 83.6 



85.4 

 88.1 



4.99 

 4.90 



250.2 

 249.8 



2.76 

 2.77 



4.08 

 4.43 



11.27 

 12.26 



8.31 



CG 



8.16 







B 



86.8 



83.8 



72.8 



79.9 



84.6 



4.35 



228.1 



2.65 



3.68 



9.77 



6.71 







