58 



BULLETIN 1121, U. S. DEPARTMENT OF AGRICULTURE. 



Table 30. — Differences between the records of each experiment and those of the total 

 inbred stock, raised simultaneously. 



[Obtained by subtracting the entries in Table 28 from those in Table 29. 1916-1919.1 



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 



-3.7 

 -1.3 



+2.2 

 +0.7 

 +4.4 

 + 1.1 



+3.0 

 -1.4 

 -6.0 

 +4.1 

 -5.4 

 -1.8 



-0.3 

 -2.7 

 -2.3 

 +3.2 

 -1.4 

 -1.6 



Grams. 

 -6.9 

 +2.5 

 +1.7 

 +4.2 

 -3.3 

 +1.9 



Grams. 

 -6.1 

 +4.8 

 +0.6 

 +3.6 

 -4.0 

 +1.2 



Grams. 



-0.71 

 + .50 

 +.01 

 + .44 

 -.04 

 +.02 



Grams. 



-29.5 



+21.3 

 +0.9 



+18.2 

 -5.1 

 +1.8 



-0.08 

 +.18 

 -.15 

 +.10 

 + .02 

 -.04 



+0.43 

 .00 

 + .05 

 +.32 

 -.27 

 -.36 



+0.68 

 +.59 

 -.39 



+1.10 

 -.55 

 -.92 



+0.58 



+ .09 



33 



13 



32 



35 



+ .71 

 46 



39 



Other 



-.50 



CO 



+1.5 

 +2.2 

 +6.2 

 +6.4 

 +8.4 

 +3.3 



+ 10.7 

 +8.7 

 +8.2 



+ 11.9 

 +9.0 

 +6.6 



+9.0 



+ 8.7 

 + 12.3 

 + 14.2 

 + 13.4 



+8.1 



+1.2 

 +2.8 

 +6.9 

 +9.0 

 +7.6 

 +5.0 



+ 1.9 

 +2.9 

 +6.6 



+.48 

 +.47 

 4-40 



+17.6 

 +18.3 

 +22.8 

 +32.7 

 +25.0 

 +21.0 



-.04 



+ .09 

 + .69 

 + .32 

 + .24 

 + .10 



+ .03 

 + .68 

 + .33 

 + 1.16 

 +1.09 

 + .86 



-.07 

 + 1.99 

 +3.40 

 + 4.05 

 +3.50 

 +2.38 



+.39 



CA 



+2.57 

 +3 51 



AC 



CC 



4-6 9 4-78 



+3.44 

 +3 15 



CI 



+5.4 

 +3.6 



+ .60 

 + .52 



€2 



+2.16 





CL 



+7.9 

 +4.3 



+3.5 

 + 4.5 



+9.7 

 +7.8 



+6.5 

 +6.2 



+3.7 

 +6.8 



+ .89 

 + .80 



+33.2 

 +33.2 



+.34 

 + .37 



+ .61 



+ .95 



+2.89 

 +3.87 



+2 99 



€G 



+2 84 







B 



+S.4 



+ 10.5 



+14.6 



+7.8 



+7.3 



+ .69 



+30.1 



+ .33 



+ .46 



+2.26 



+2.52 





Table 31. — Estimated probable errors of the indices and averages of Table 29. 



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 



ye.ar. 



2 



1.2 

 L3 

 1.5 

 1.2 

 1.7 

 1.1 



1.2 

 1.6 

 2.0 

 1.4 

 2.3 

 1.4 



L3 

 1.6 

 1.9 

 1.4 

 2.2 

 1.3 



Grams. 

 0.40 

 .48 

 .57 

 .44 

 .65 

 .37 



Grams. 

 0.47 

 .59 

 .70 

 .53 

 .84 

 .49 



Grams. 

 0.044 

 .056 

 .066 

 .050 

 .079 

 .047 



Grams. 

 L71 

 2.16 

 2.56 

 1.91 

 3.06 

 1.80 



0.028 

 .042 

 .042 

 .037 

 .055 

 .028 



0.060 

 .085 

 .096 

 .071 

 .123 

 .072 



0.190 

 .216 

 .239 

 .217 



.258 

 .134 



0.154 



13 



.174 



32 



.199 



35 



.173 



39 



.217 



Other 



.115 



Inbred 



CO 



.5 

 1.0 

 1.5 

 1.2 

 1.2 

 1.1 

 2.2 



.6 

 .9 

 1.3 

 1.2 

 1.4 

 1.4 

 2.4 



.6 

 1.1 

 1.8 

 1.5 

 1.6 

 1.6 

 2.8 



.19 

 .35 

 .64 

 .59 

 .52 

 .52 

 .95 



.23 

 .39 

 .67 

 .60 

 .58 

 .57 

 1.04 



.022 

 .037 

 .064 

 .057 

 .054 

 .054 

 .099 



.85 

 1.43 

 2.45 

 2.19 

 2.09 

 2.07 

 3.80 



.015 

 .027 

 .057 

 .063 

 .047 

 .047 

 .078 



.033 

 .060 

 .079 

 .088 

 .058 

 .058 

 .111 



.080 

 .146 

 .359 

 .343 

 317 

 .303 

 .537 



.066 

 .123 



CA 



.284 



AC 



.261 



CC 



.240 



CI 



.232 



C2 



.418 







CL 



1.2 

 1.3 



1.7 

 1.4 



1.8 

 1.6 



.66 

 .56 



.73 

 .61 



.069 

 .058 



2.67 

 2.23 



.070 

 .056 



.091 

 .059 



.401 

 .351 



.308 



CG 



.259 







B 



.8 



.9 



1.0 



.33 



.36 



.034 



1.32 



.030 



.052 



.174 



.137 







