AN ANALYSIS OF THE EFFECT OF SELECTION. 13 
The ‘‘new” series, which was carried on at a constant temperature, 
shows remarkably little fluctuation. Of the two reversed-selection 
series, one suggests a positive result, but was not carried on long 
TasiLe 9.—1002, Inbred Plus Line. 
Generation. n M o be Diff. M. 
1 ane ae oc 114 | 5.0700.051 | 0.815=0-036 | ..............- —0.930 
Boejocccinsicis 231 | 5.052+ .039 ESS == A O25M |i erefeictapitercacel ol aere — .948 
Uap eacddae 446 | 5.473+ .025 .784+ .018 | + .157+0.031 | — .661 
Watictti:stlelete 1,199 | 5.126 .018 .922+ .013 + .153+ .019 —1.113 
Cae Soo 1,142 | 5.658 .014 .720+ .010 — .024+ .020 — .397 
Recetas 632 | 5.389+ .022 .853+= .015 + .381+ .024 —1.029 
Eizetehoal sietctess 283 | 5.675+ .027 .683= .019 — .805+ .036 | —1.127 
Bat sb cle ee 584 | 5.202+ .023 .826+ .016 + .481= .022 | —1.122 
igniayerisiciete 373 | 5.507+ .027 .763+ .019 + .205= .033 | — .690 
Biotec sites 269 | 5.952+ .018 450+ .013 + .115= .040 | — .128 
Baha veltoraieleves 133 | 6.158+ .026 .456+ .018 — .025= .058 | — .477 
5,406 
New set 
eye sicisis 167 | 5.850+0.021 | 0.362+0.014 | !—0.038+0.046 | ....... 
iM enodor 447 | 5.978+ .011 .340+ .008 — .009+= .032 | +0.087 
Lenooee 377 | 5.889+ .020 .563+ .014 + .048+ .034 | — .668 
LOS naeee 79 | 5.886+ .031 .422+ .022 | 14 .1234 .042 | —1.114 
DR gererictets 73 | 5.904 .046 .578= .032 | 1— .062+ .072 | — .096 
Reticse'e.: 128 | 5.969+ .026 .429= .018 | T— .031+= .039 | ....... 
Bgevoveretes= 92 | 5.935+ .027 oS Leh OLD) |\iteyetovercycletersterscerereje —1.165 
Bei ctinac 79 | 5.93874 .045 RSSA=EP SOSID |r yeincyeveis ovcievers — .063 
1,442 
REVERSED SELECTION. 
pa vaystets i atere 62 | 5.339+0.085 | 0.989+0.060 | ............... +1.339 
Wg er oh ste (s)sievots 46 | 4.652+ .089 BO90S= S063) ||rcrercteiin va «veinzies) ole + .652 
Eyrisieis\ais.c¥ers\ 68 | 4.147+ .062 Oo BOLE ietescts cin eeeiaios “vo + .147 
Wig nsyafereioicie'= 23 | 4.739 .119 A a5 OBA! IIIS ateyess ofoia <listalsia eter +1.239 
izexsrsishazetelets 125 | 4.680+ .060 2993 ls O42) I eevee ayes) aric\sl= cle +1.180 
New set 
Rialeicteyalers 49 | 5.898+0.046 | 0.463+0.032 | ............... +0.898 
etic cecie 13 | 6.000+ .000 SEDER AOE UA Sop pononc naasoc + .500 
Bigs 5 cists 99 | 5.707+ .041 SEY ES: ollP+3al | Ryo nee momen os | | oeaenroS 
485 
1Includes reversed selection, that is, not included in the remainder of these data. 
enough to be significant, and the other was clearly without effect. 
The line was now presumably uniform, and not capable of modifica- 
tion through further selection. 
CROSSBRED PLUS SERIES. 
The material for this series came from the following sources: Cul- 
tures 902, 926, 1006, 1081 of the 864 inbred plus line; culture 1072 of 
