90 EXPERBIENT STATION. [Jan. 



This t;il>l(' shows, in the case of l)oth varieties, I'airlv lari:c eo- 

 ellicients, and thev are in both cases larger for the short vdnes 

 than for the long vines. These figures form a too slender basis 

 for a definite conclusion as to the correlation between vine 

 length and the average weight of peas produced, but so far as 

 they go they consistently favor the supposition that the correla- 

 tion does exist and is fairly large. The average of the four is 

 +.2287. 



Table VI. — Correlatiun of Average Seed Weight and Vines produced. 



Strain A, I), F, G, K, + .0710 ± .0234 



Strain B, E, H, J, + .1045 ± .0280 



Alaska, + .0146 It .0178 



First of All, — .0290 dz .0;51)0 



Turning now to the consideration of the question as to 

 whether the heavier peas produce larger vines than do the lighter 

 ones, we have the figures shown in Table \1. For reasons 

 shown a little further on in this ])aper, the group Excelsior I. is 

 divided into two strains, one of 5 lines and the other of 4 lines 

 as shown in the table. The group First of All is from a selec- 

 tion of this variety that is of the same nature as the others. The 

 number of vines is relatively small, and the figures, therefore, 

 of less value than the other groups. It is because of the snuill 

 numbers tliat the correlation of parent vine length and weight 

 of their seeds are not given, but as far as they go they arc in 

 reasonable agreement with those of the two groups that arc 

 given. 



It appears from the limited data given in Table VI. that the 

 correlation is larger for the wrinkled Excelsior peas than for 

 the starchy Alaska and First of All varieties. Only the coeffi- 

 cients for the first two groups should therefore be compared 

 with tlic coiTehition of al)our +.00 found to exist between parent 

 and offspring as shown in Table II. 



Xo positive conclusion in this matter can be drawn. I'he in- 

 dications arc that a part and pos8il)ly all of the correlation of 

 .()(! may be accounted for by the correlation between length of 

 vine and seed weight. 



