1910.] 



PUBLIC DOCUMENT — No. 31. 



195 



(a) From Different Trees. 

 Table 1 shows the means/ standard deviations and coefficents 

 of variability, with their jn'obable errors, in the size and form 

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

 there are differences in both size and form. 



Table 1. 



Tree 2. 

 Tree 3, 

 Tree 5i 

 Tree 7, 



Size. 2 



Mean. 



Stand- 

 ard De- 

 viation. 



Coeffi- 

 cient of 



Vari- 

 ability. 



7I.02±.14 

 68.80±.15 

 68.35 ±.13 

 72.80±.18 



70.23=*= .08 



6.16±.10 

 5.31±.10 

 5.55±.08 

 6.45±.13 



5. 95 ±.06 



8.67±.14 

 7.72±.16 

 8.12±.13 

 8.86±.17 



8.47±.08 



Form. 



Mean. 



1.1422±.0014 

 1.1399±.0016 

 1.1666±.0019 

 1.1716±.0019 



1.1515±.0OO8 



Standard 

 Devia- 

 tion. 



.0576±.0009 

 .0543 ±.0011 

 .0626±.0O13 

 .O578±.0O13 



.0589 ±.0006 



Coeffi- 

 cient of 

 Vari- 

 ability. 



3.04±.88 

 4.73 ±.09 

 3.76±.08 

 3.37±.07 



5.29±.05 



Num- 

 ber of 

 Ap- 

 ples. 



864 

 567 

 469 

 423 



2,321 



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, 



tx'-rp.EE: 3 



TRE£ 7-0> 



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. 



2 All measurements are in millimeters. 



