18 AN ANALYSIS OF THE EFFECT OF SELECTION. 
7 7 
6 6 
5 F 5 
’ NS es , Pe OO 
3 3 
2 2] 
ee 1 
et 
1 2 3 4 5 6 4 5 6 7 8 9°10 11 12 
Fie. 7. Fia. 8. 
Fia. 7.—Means and standard deviations for 868 inbred minus line. 
Fig. 8.—Means and standard deviations for crossbred minus line. 
Taste 15.—Crossbred Minus Series. 
Generation. n M o r Diff. M. 
Fysiegis ns a x0 323 | 4.523=0.028 | 0.753+0.020 | .............. +0.523 
by err rece artes 688 | 4.297+ .020 -786 .014 | +0.070+0.026 | + .711 
Fg iano 1,022 | 4.667+ .017 829+ .012 | — .048+ .021 | +1.280 
0 eee 1,473 | 4.357 .013 .735= .009 | — .151+ .017 | + .558 
Hesuieecaias 1,503 | 4.522+ .014 .788+ .010 | + .026= .016 | +1.055 
PS aic-0 8 ee os 401 | 4.354 .025 .730 .017 | — .142+ .033 | + .742 
Figs cea 265 | 4.083 .026 .621+ .018 | — .107= .041 | + .511 
Binns ares 245 | 4.073 .030 666 .021 | + .230+ .041 | +1.008 
Fr... eee. 177 | 4.475 .039 .767+= .027| — .191+= .049 | +1.334 
6,097 
1From F; of the inbred speck line described later. 
Table 16 and figure 9 show the result. The break after F; represents 
the same treatment as that given to the 1002 line (p. 10)—4. e., two 
generations of unselected mass cultures. 
This line gives perhaps the clearest evidence of the effectiveness of 
selection that we have yet observed. Reversed selection begun in 
F, was apparently also successful. Finally, the line after F, gives 
consistently lower means than any other here recorded. 
