58 BULLETIN 1121, U. S. DEPARTMENT OF AGRICULTURE. 
TABLE 30.—Differences between the records of each experiment and those of the total 
[Obtained by subtracting the entries in Table 28 from those in Table 29. 1916-1919.] 
inbred stock, raised symultaneously. 
[etl tetett| tides 
days. 
ai 
2 
Weight | «a; Litters | Young 
t 33 Size of per 
r 
00 
TABLE 31.—Estimated probable errors of the indices and averages of Table 29. 
Per 
cent . 
pec ooo raised | Per | Birth oa 
fo} 
ment. | born | tose | raised. | total, °F those 
alive. naeal raised. 
alive 
Grams. |Grams 
Dit Aso OSS —3.7 +3.0 —0.3 —6.9 —6.1 
1 eee oo a —1.3 —1.4 —2.7 +2.5 +4.8 
34S See ly +2.2 —6.0 —2.3 +1.7 +0.6 
8 fg pees Liars +0.7 +4.1 +3.2 +4.2 +3.6 
a Serene Ree +4.4 —5.4 —1.4 —3.3 —4.0 
-Other....:. +1.1 —1.8 —1.6 +1.9 +1.2 
COR. 32ee +1.5 | +10.7 +9.0 +1.2 | +1.9 
CAq 2 ee +2.2 +8.7 +8.7 +2.8 +2.9 
U\( OSPR RG 8 De +6. 2 +8.2 | +12.3 +6.9 +6.6 
COns. Suet +6.4 | +119 | +14.2 +9.0 +6.9 
Cle bas +8. 4 +9.0 | +13.4 +7.6 +5.4 
Coie eerses +3.3 +6.6 +8.1 +5.0 +3.6 
CE, cr) wee £750)| $3850] 9.71) 6158) ey 
COreseetis +4.3 +4.5 +7.8 +6. 2 +6.8 
1B eens eres +8.4 | +10.5 | +14.6 +7.8 +7.3 
Per 
cent ; 
expert | cant | Tased | Per. | Birth | Duth 
TE ts born sie ad | Mota of those 
alive Horn raised. 
alive. 
Grams.| Grams. 
De iaaa cease Ey 12 163) 0. 40 0.47 
1S RE ak a ERE 15S} LG 1.6 48 .59 
Sh tan nak es 2.0 1.9 57 .70 
DD eviet ieee es 1.2 1.4 1.4 44 A 58: 
SOS te see 1.7 IAB: Php . 65 . 84 
Other...... ital 1.4 1.3 337/ .49 
Inbred.....- 5 -6 -6 19 PB: 
A es a aa 1.0 -9 ite 35 .39 
OC med Sand Fi 155) 123 1.8 64 . 67 
ING 3 Ae eae 1.2 1189; 185 -59 . 60 
CON es 152 1.4 1.6 5594 - 58 
Cleo sess eal 1.4 1.6 PEP BGYS 
(07 a eee P49 2.4 2.8 95 1,04 
“Oe eee 12 1.7 1.8 . 66 73 
EO Ges eae 1.3 1.4 1.6 . 56 | 61 
1 ee so 9 1.0 .33 36 
Grams.| Grams. 
0.0 
1.71 
2.16 
2. 56 
no 
3. 06 
1.80 
85 
1. 43 
2. 45 
2.19 
2.09 
2.07 
3. 80 
2.67 
2. 23 
1.32 
f Litters | Young 
per 
year. 
Young 
raised 
year. 
