M 



BULLETIN 1121, U. S. DEPARTMENT OF AGEICULTITRE. 



Table 22. — Number of mature matings during successive 3-month periods, 1916-1919. 

 Inbreeding and crossbreeding exferimsnts. 



Experi- 



1916 



1917 



1918 



1919 



Year 

 mat- 



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 



ings 

 total. 



2 



13 



32 



35 



39 



Other... 



29.0 

 36.7 

 23.3 

 29.7 

 32.3 

 142.0 



32.3 

 33.7 

 20.0 

 24.7 

 25.3 

 123.0 



259.0 

 39.0 



33.0 

 34.0 

 19.0 

 23.0 

 23.7 

 107.3 



240.0 

 51.3 



31.0 

 31.3 

 19.0 

 22.3 

 21.0 

 100.7 



29.0 

 24.3 



17.0 

 20.3 

 18.7 

 101.0 



21.7 

 16.0 

 13.0 

 18.7 

 16.7 

 76.3 



22.3 

 16.0 

 12.0 

 16.3 

 12.0 

 52.0 



21.0 

 14.0 

 15.0 

 20.7 

 8.7 

 31.3 



22.7 

 12.3 

 17.0 

 22.3 

 7.7 

 17.0 



28.7 

 13.7 

 17.0 

 21.0 

 7.3 

 12.3 



31.0 

 •17.0 

 11.7 

 20.0 

 6.3 

 7.0 



32.7 

 18.0 

 12.3 

 22.3 

 5.0 

 4.7 



37.3 39.0 34.0 

 19.3 23.7 25.3 

 13.7 18.0 19.0 

 22.3 29. 7i 31.0 

 7.3 10.01 10.7 

 3.3 



32.7 



27.7 

 24.0 

 35.3 

 12.3 



119.4 

 90.7 

 67.8 

 94.9 

 56.3 



194.5 



Inbred.. 



CO 



CA 



AC 



293.0 

 3.0 



225.3 



72.3 



1.3 



210.3 

 82.3 

 2.7 

 0.3 

 11.7 

 14.0 

 .3 



162.3 



75.3 



4.0 



1.0 



22.3 



19.0 



1.3 



130.7 



68.3 



5.0 



3.0 



36.7 



26.0 



4.7 



110.7 

 53.7 



6.0 

 10.0 

 32.7 

 29.0 



6.0 



99.0 

 49.0 



6.7 

 10.0 

 33.0 

 32.3 



8.7 



100.0 



47.7 

 6.0 

 8.3 

 26.7 

 28.0 

 7.7 



93.0 

 38.3 

 8.0 

 11.3 

 20.0 

 24.0 

 10.0 



95.0 

 34.7 

 10.0 

 19.0 

 19.0 

 24.7 

 11.7 



103.3120.31120.0132.0 

 31.0 24.3! 33.7! 28.7 

 16.7 30. 7i 32.0, 28.7 

 22.3 31. 3I 3S 3! .^fi. 7 



623.4 

 183.2 

 39.4 

 48 2 



CC 







.3 

 .3 



6.0 

 7.0 



8. 7 





54.3 



CI 



C2 



:i:ii 





13.3 7.3 

 9.3 6.3 



4.3; .3 

 3.3 1.0 



57.4 

 17.6 



CL 















2.7 

 4.7 



10.7 

 18.3 



12.7 



12.7 



12.7 

 19.0 



16.0 26.0 

 28.3 33.0 



39.7 35.0 



22.0 19.7 

 29.3 21.7 



33 8 



CG 

















19.0 16.0 



47.4 



















28.3 







B 



43.0 



44.7 



51.3 



50.3 48.7 



43.3 



41.0 



35.0 



39.0 



35.0 



34.0 



35.3 



34.7 



159.6 



Table 23. — dumber of litters bom during successive 3-month periods, 1916-1919. In- 

 breeding 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... 



30 

 25 

 20 

 26 

 22 

 107 



26 

 26 

 16 

 20 

 19 

 67 



33 

 31 



18 

 20 

 16 

 83 



201 

 43 



27 

 22 

 15 

 23 

 18 

 71 



176 

 56 



23 

 16 

 12 

 17 

 10 

 61 



139 

 67 



4 



25 

 9 

 11 

 15 

 12 

 48 



16 



14 

 8 



19 

 8 



34 



22 

 15 

 16 

 18 

 9 

 22 



24 

 9 



12 



19 

 6 



14 



22 

 10 

 11 

 15 



7 

 6 



27 

 10 

 11 

 22 



4 

 4 



78 

 25 

 7 

 9 

 21 

 27 

 10 

 11 

 14 



30 

 15 



8 

 18 

 2 



76 

 22 

 14 

 17 

 19 

 25 

 11 

 12 

 21 



42 

 19 

 14 

 23 

 6 



36 

 23 



18 



26 



6 



33 



28 



15 



28 



6 



25 

 21 

 18 

 32 

 12 



441 

 293 

 223 

 341 

 163 

 520 





104 

 24 

 16 

 22 

 9 

 14 

 10 

 21 

 33 











Inbred.. 

 CO.... 



230 



174 

 17 



120 

 63 

 3 

 1 

 22 

 22 

 2 



99 



76 



6 



3 



47 

 28 

 6 



102 

 44 



t 



39 

 35 



7 

 1 

 9 



84 

 36 

 8 

 8 

 33 

 34 

 12 

 11 

 21 



71 



29 



6 



10 



28 

 27 

 6 

 7 

 20 



109 

 24 

 33 

 38 



110 

 31 

 37 

 33 



108 

 31 

 25 

 35 



1,981 



588 



CA 





164 



AC 











184 



CC 







1 



7 

 10 



12 

 13 



238 



CI 







9 



6 



31 



36 



5 



4 

 24 

 29 



..... 



20 



27 



249 



C2 









75 



CL 













138 



CG 

















210 





















B 



43 



36 



46 



45 



44 



40 



42 



33 



35 



30 



31 



34 



39 



33 28 



29 



588 



