56 



BULLETIN 1121, U. S. DEPARTMENT OF AGEICULTURE. 



Table 26. — Number of young raised to weaning {33 days) during successive 3-month 

 periods, 1916-1919. Inbreeding and crossbreeding experiments. 



Experi- 



1916 



1917 



1918 



1919 



Total 



ment. 



1-3 



4-6 



7-9 



10-12 



1-3 



4-6 



7-9 



10-12 



1-3 



4-6 



7-9 



10-12 



1-3 



4-6 



7-9 



10-12 



2 



13 



32 



35 



39 



Other... 



14 

 20 

 17 

 25 

 13 

 70 



36 



24 

 13 

 27 

 25 

 81 



47 

 43 

 29 

 35 

 23 

 102 



29 

 24 

 16 

 31 

 15 

 78 



15 

 17 



3 

 19 



6 

 42 



30 

 6 

 16 

 14 

 13 

 60 



14 

 19 

 14 

 30 

 7 

 53 



38 

 17 

 16 

 32 

 16 

 31 



150 

 79 

 5 

 17 

 74 

 70 

 9 

 2 

 18 



34 

 15 

 8 

 30 

 7 

 9 



24 

 4 

 8 



11 

 8 

 7 



31 

 11 



11 

 28 

 3 

 6 



55 

 30 

 15 

 36 

 3 

 5 



72 

 28 

 17 

 36 

 13 



56 

 50 

 34 

 36 

 12 



60 

 49 

 27 

 42 

 9 



42 

 33 

 21 

 53 

 18 



597 

 390 

 265 

 485 

 191 

 544 















Inbred . . 

 CO 



159 



206 

 16 



279 

 62 



193 

 54 



102 

 63 

 4 



139 



103 



7 



1 



41 



40 



2 



137 

 110 

 11 

 5 

 74 

 55 

 11 



103 

 55 

 10 

 10 

 59 

 59 

 13 

 10 

 19 



62 



33 



6 



9 



44 



41 



9 



11 



28 



90 

 31 

 11 

 22 

 37 

 39 

 15 

 16 

 22 



144 

 43 

 20 

 39 

 45 

 46 

 26 

 27 

 48 



166 

 43 

 27 

 60 

 18 

 29 

 24 

 35 

 61 



188 

 50 

 68 



104 



187 

 66 

 91 

 85 



167 

 63 

 55 

 83 



2,472 

 871 



OA 





315 



AC 





::.::::.:: 





435 



CC 







1 



8 

 8 



12 

 12 



413 



■CI 





.. . . 



20 

 10 

 69 

 80 



9 



5 



67 



64 



..... 



44 

 47 



428 



C2 





.:..:i... . 



125 



CL 





i 







281 



-CG 

















387 





















B 



74 



60 



97 



75 



52 



80 



75 



72 



57 



38 



44 



74 



85 



66 



61 



61 



1,071 



Table 27. — Indices and averages, showing the record of the total inbred stock in various 

 characteristics during successive 3-month periods, 1916-1919. 



Character. 





1916 







1917 • 







1918 







1919 





1-3 



4-6 



7-9 



10-12 



1-3 



4-6 



7-9 



10-12 



1-3 



4-6 



7-9 



10-12 



1-3 



4-6 



7-9 



10-12 



Per cent bom 

 alive 



65.6 



47.3 

 32.4 



74.5 



74.6 

 56.0 



80.4 



78.8 

 63.0 



78.3 



61.8 

 49.3 



67.1 



47.6 

 32.8 



69.9 



73.0 

 53.8 



84.1 



76.5 

 63.9 



83.8 



79.3 

 66.8 



82.1 



68.6 

 57.0 



69.9 



57.0 

 40.4 



80.7 



66.0 

 53.0 



87.3 



94.7 



82.7 



81.9 



86.2 

 70.5 



84.0 



87.3 

 73.4 



86.0 



87.6 

 75.8 



84.0 



Per cent raised of 



born alive 



Percent raised... 



80.0 

 67.9 



Birth weight 

 (total) 



Birth weight 

 (raised) 



Gain 



Weight, 33 days.. 



69.6 



76.3 

 3.18 

 181.3 



71.0 



77.9 

 3.32 



187.4 



68.5 



73.6 

 3.04 

 174.0 



71.9 



77.6 

 3.15 

 181.4 



64.5 



72.3 

 3.19 

 177.6 



65.0 



72.4 

 3.07 

 173.8 



66.3 



70.9 

 3.70 

 192.9 



75.3 



78.0 

 4.11 

 213.6 



69.8 



73.3 

 3.55 

 190.6 



63.8 



71.1 

 2.72 

 160.8 



66.0 



73.0 

 3.22 

 179.1 



81.9 



85.1 

 5.20 

 256.8 



83.1 



85.2 

 4.43 

 231.5 



83.1 



85.7 

 4.43 

 232.0 



79.1 



81.9 

 3.89 

 210.3 



76.6 • 



78.3 

 3.73 

 201.3 



Size of Utter 



Litters per year.. 



Young per year. . 



Young raised per 



year 



2.27 

 3.14 

 7.12 



2.17 



2.21 

 2.69 

 5.94 



3.18 



2.49 

 3.35 

 8.33 



4.65 



2.38 

 3.13 

 7.42 



3.43 



2.15 

 2.64 

 5.68 



1.94 



2.18 

 2.96 

 6.43 



3.43 



2.25 

 3.03 

 6.82 



4.19 



2.27 

 3.68 

 8.38 



5.42 



2.25 

 3.39 

 7.62 



4.16 



2.31 



2.84 

 6.56 



2.48 



2.28 

 3.36 

 7.67 



3.87 



2.30 

 3.19 

 7.35 



6.06 



2.4'! 

 4.03 

 9.84 



6.43 



2.50 

 3.62 

 9.07 



6.25 



2.57 

 3.67 

 9.43 



6.23 



2.37 

 3.27 

 7.76 



5.06 



;Sex ratio 



120.3 



88.3 



93.2 



104.0 



105.0 



111.0 



109.9 



90.0 



86.3 



118.1 



116.5 



98.8 



130.6 



110.2 



102.2 



101. 6 



