SELECTION WITHIN PURE LINES OF PESTALOZZIA 



189 



TABLE 13 



Means and standard deviations of appendage lengths of cultures studied in experiment 2. The 

 mean of each culture was calculated from 100 or more measurements. Values are given in units of 

 micrometer scale: 1 unit = 1.8 microns. Single-spore culture of parent strain (No. 29). Mean 

 12.42, a =2. 08. 



Generation 1 of experiment 



Mean of generation 13.30 



Generation 2 



GENETICS 7: Mr 1922 



