No. 563] STUDIES ON DIFFERENTIAL MORTALITY 699 



ment, it is necessary to note that, except for the coeffi- 

 cients of variation, these constants are in absolute values. 

 Clearly enough a difference of .254 unit in mean or of 

 .197 in S.D. for White Flageolet beans with an average 

 weight of 6.755 units and a S.D. of 1.071 units is not com- 

 parable with a difference of the same absolute amount in 

 Golden Wax or Burpee's Stringless with a mean weight 

 of, say, 18.401 and a scatter in weight of 2.544 units. 



TABLE Xis 

 Physical Constants for General Population 



