82 
TABLE 13 
HENRY H. DONALDSON 
Giving for each body weight group of Mus norvegicus albinus the mean values for all 
the individuals from each of the four stations. 
Below each weight group is also 
given the mean for the European series, so far as represented in the group. 
Records from Philadelphia = 
AC Paris) — sb London — 
L; Vienna = V 
NUMBER OF | 
WEIGHT GROUP SERIES aia i ais liga Raa onANTAT 
M. F. ‘ 
| grams mm. CC. 
A OMe 87.8 5G 1.364 
S100. hs ee P yt 90.0 | 158 | 1.443 
L 
Vv 
IRATISSCRIeS: eae eee one ee neo 2, | PLSPNtnbet eeat es 90.0 158 1.443 
A LO ts WAY 8) 173 1.524 
i - ef land | 
101-150 ERS |. ton ee bale a 12 oO 1 117 6 175 | 1.560 
L 1 1 128.0 7A 1.494 
Hy OW 0 2 145.5 | 174 1.497 
Meanofpunopeamiseriess..4-.4<.clusaearle: «one ae 130.4 174 iba ly 
A 19 B) || gGb 193 1.661 
PO eee Se, P 1} 0 | 173.0 ) 194 | 1.671 
L 0 De 184.0 196 1.646 
V 1 3 160.2 184 | 1.688 
Meamormmunopeaniseriess. ce. o024| hearers: |p cea peers 172.4 191 1.652 
A 13 Dy 218.6 1.748 
DLP Oe et OMe a Od eal eee eee 208 [ee 
L eae ll 234.7 | 209 1.758 
V 1 1 | 213.5 199 | 1.704 
Mean of European series....... Allee ioc an ete echoed [ease ea 217.1 204 1.761 
A if 1 210.9 1.768 
251-300 s | 
aes Fi. CARRERE con tL | (3) fs 27606 || ois” aieens 
V 2 OD) S280) Ara ee | 1.916 
Mean of London and Vienna 
NGO. Jo) Se nate aCe ee Alicea ile. lems ri ef 283 .0 220 | 1.860 
Chisolm used the posterior margin of the symphysis pubis, 
while I used the anus, as the caudal limit of the measurement and 
thus my measurements must give slightly greater values than were 
found by him. 
When correction is made for this difference in 
method, the two series of records agree nicely and give a welcome 
