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 
Tasie 9.—1002, Inbred Plus Line. 
Generation. n M o r Diff. M. 
Wieck shacuans 114 | 5.070+0.051 | 0.815+0.036 | ............... —0.930 
Fae eeousac 231 | 5.052 .039 £886 028 fo vsstcewis eee vaca — .948 
Ben Regianscen 446 | 5.4734 .025 784 .018 | + .157+0.031 | — .661 
Me sidlecenaee 1,199 | 5.126 .018 922+ .013 + .153+ .019 | —1.113 
Béscscccewsd 1,142 | 5.658 .014 .720+ .010 | — .024= .020 | — .397 
Bee sass aguacere 632 | 5.389 .022 8538+ .015 + .381+ .024 | —1.029 
yee Te 283 | 5.675 .027 .683 .019 — .805+ .036 | —1.127 
Figs sccciiscieues 584 | 5.202 .023 826 .016 | + .431+ .022 | —1.122 
Foye a cusaee 373 | 5.507 .027 7638 .019 | + .205= .033 | — .690 
Bi6 ins. sarcioes 269 | 5.952 .018 450+ .013 + .115+ .040 | — .128 
Patiese taster 133 | 6.158 .026 456 .018 — .025+ .058 | — .477 
5,406 
New set 
Bis sices 167 | 5.850+0.021 | 0.362+£0.014 | 1—0.038+0.046 | ....... 
Fo...... 447 | 5.978% .011 .3840+ .008 — .009= .032 | +0.087 
Fs...... 377 | 5.889 .020 -563= .014 | + .048+ .034 | — .668 
Ress sings 79 | 5.886 .031 422 .022 | 14 123% .042 | —1.114 
Peis: sarass 73 | 5.904 .046 .578 .032 | 1— .062+= .072 | — .096 
Fg sxc 128 | 5.969 .026 429% .018 | 1— .0381+ .039 | ....... 
aoe 92 | 5.935 .027 881 .019 | ......... eee ee —1.165 
Wg 5. Ait, 79 | 5.937% .045 584 1081 | ...........00.- — .063 
1,442 
ReverseD SELECTION. 
Figeaeeoeis 62 | 5.339+0.085 | 0.989+0.060 | ............... +1.339 
oe 46 | 4.652= .089 890 .063 | ............... + .652 
AD eee 68 | 4.147 .062 7538 1044]... .. eee eee + .147 
Pigiiage eesecavave 23 | 4.739% .119 845 1084] ............08e +1.239 
di eee ee 125 | 4.680+ .060 993 .042 | ...........08.. +1.180 
New set 
Fass oi as 49 | 5.898+0.046 | 0.463+0.032 | ............... +0.898 
Bopxies ox 13 | 6.000 .000 -000+ .000 | ............... + .500 
nO epee 99 | 5.707 .041 2018 4028: | -secscadeeaeesa | vacaan es 
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 
