1. hiherltmice in Shirlet/ ro2^p>i 



75 



influences in tlieir Mowcrs, is well evidenced by the followiug ru.sults provided 

 by W. F. R. Wcldun froin his Oxford crop. 



TABLE VIII. 



The i'egression therefore is fairly constant, althongh the corrolatiou varies. 

 The relationship as expressed by the correlation is greatest, when we avoid 

 differentiation in either the plants themselves or in their fruits, but such differen- 

 tiation does not widely influence the regression, which for this O.xford crop takes 

 a mean value not very divergent froni wliat has been found for the forearm 

 in man ('-12 as mean of four resiilts). 



(9) Grandparental Inheritance. Our data for grandparental inheritance are 

 very limited and siiffer even niore than the parental material from changes in crop 

 treatment. Thus the original grandparents were grown at Hampdeu on the top of 

 the Chilterns, the parents at Enfield and their offspring at Kidderminster. There 

 is thus considerable change not only in soil but treatment ; unfortunately we had 

 not the means of carrying on the experiments under uniform sivpervision in the 

 same environment. From the Kidderminster crop, we had 19,204 capsules due to 

 100 parent plants and 24 grandparental plants — in all cases the polleu plants being 

 tmknown. The grandparental plant mean was 12'64 and the Standard deviation 

 1*1609. The grandchild capsule mean was 13"19 with a Standard deviation of 

 1"7526. The correlation between grandparental plant mean and grandchild capsule 

 was •0490. The regression of offspring capsule on grandparental plant mean was 

 thus "0739. If we use the third method and the value of the Kidderminster 

 homotyposis it would be '1216. The only result with which these can be compared 

 is the Enfield II grandparental capsule result (see p. 74). Dividing this by the 

 product of the two Enfield homotypic values, we should have ^1897 for the grand- 



" On the thinning out oue plant, the principal plant was left in a pot, but later other seed germinated 

 and small secoudary poppies were found in a number of pots. 



10— -J 



