1910.] 



PUBLIC DOCUMENT — No. 31. 



195 



(a) From Different Trees. 

 Table 1 shows tlie nicans,^ standard deviations and coeffioonts 

 of variability, with their probable errors, in the size and form 

 of the apples from each of the four trees. It is evident that 

 there are differences in both size and form. 



Table 1. 



There seems to be little or no relation between the size of the 

 apples and the yield. Trees 2 and 7 produced the larger apples, 



t.^-rf\EE. 3 



TREE 7^> 



Fig. 1. 



and one of these gave the highest yield of all and the other the 

 lowest, less than half as many. There are seen to be slight 



1 For the method of making these calculations, see p. 198. 

 ' All measurements are in millimeters. 



