196 



EXPERIMENT STATION. 



[Jan. 



ditfereiices in the variability in size of apples from the different 

 trees. 



More striking are the differences 'in mean index of form, 

 though the variability of form is less than that of size. The 

 difference in form of the apples from Trees 3 and 7 is shown 

 graphically in Fig. 1. These differences in form were per- 

 ceptible to the eye, and there were also differences in color, 

 apples from Tree 5 being higher colored than the others. 



These differences may be attributed to bud variation or to the 

 influence of the stock, for the trees were near each other, and, 

 so far as could be seen, on exactly similar soils. In passing it 

 may be suggested that this method offers means of throwing 

 light on these two disputed questions, namely, bud variation and 

 the mutual influence of stock and scion. 



(h) From Different Parts of the Trees. 

 The results of computations of the apples from different parts 

 of the tree are shown in Table 2. It appears from this that 

 ai)plcs from the top of the tree are a little larger than those 

 from the lower branches and also slightly more variable. In 

 form the differences in both mean and standard deviation are 

 slight, those from the lower branches being a little longer than 

 those from the top of the tree. The most important thing about 

 this table is that it serves to liring out the greater differences 

 in the products of the individual trees. 



Table 2. 



Upper south, . 

 Lower south, . 

 Upper north, . 

 Lower north, . 



Size. 



Mean. 



70.93±.18 

 69.24 ±.14 

 71.27±.20 

 69.79±.12 



Stand- 

 ard De- 

 viation. 



6.40±.13 

 5.68±.10 

 6.14±.15 

 4. 96 ±.08 



Coeffi- 

 cient of 



\'ari- 

 ability. 



9.02±.19 

 8.20±.14 

 8.47±.19 

 7.11±.12 



Form. 



Mean. 



1.1643±.0017 

 1.1512±.0015 

 1.1.5.53 ±.0020 

 1.1406±.0016 



Standard 

 Devia- 

 tion. 



Coeffi- 

 cient of 

 Vari- 

 ability. 



.0593 ±.00 12 

 .0619 ±.0011 

 .0607±.0014 

 .0644 ±.0011 



3.61±.07 

 4.19±.07 

 3. 91 ±.08 

 4.58±.07 



Num- 

 ber of 

 Ap- 

 ples. 



518 

 714 

 414 

 676 



