GROUPS OF FLUCTUATING VARIATION 



TABLE 3 

 Latitude of variation in segmentation time 



565 



tion, i.e., the difference in time between the segmentation of the 

 last and that of the first egg in a field for different temperatures 

 for all observations made. The averages appear in the last 

 line. , 



This series illustrates the source of error to which we have 

 already alluded, namely, that at low temperatures the times 



