418 



RUTH J. STOCKING 



day to carry on the line. It is evident that this selection has 

 had no effect on the character of these lines. 



In 43 lines of race C a continuous selection of abnormals was 

 made, in one line for 40 days and 37 generations. Their char- 

 acter was not changed by this sort of selection; their proportion 

 of abnormality is the same as that for the race as a whole (table 

 3). The data from them is given in table 6, and the histories 

 of a few in chart 3. In very case one abnormal was chosen on 

 each day to carry on the line. 



30 



D. 



Three times in the history of this sarne race all of the indi- 

 viduals died with one exception; in every case this single sur- 



