56 Study of Rigid- and Left- Handedness 



tbat the direction of folding of the first leaf is not inherited. The 

 same conclusion is to be reached from a consideration of the offspring 

 of each individual ear I — IV. Ear I, which produced a gi-eat excess of 

 LH plants in 1910, gave in 1911 a ratio almost identical with the 

 average: ears II — IV, which gave an excess of RH plants in 1910, also 

 approximated to the same ratio in 1911. 



Thus the conclusion of m}' earlier paper with respect to the non- 

 inheritance of right- and left-handedness in the fold of the first leaves 

 of two-rowed Barley is amply confirmed. This must be clearly 

 distinguished from the fact that the ratio between rights and lefts is 

 approximately the same in successive generations, as shown in Table II 

 for Kiuver Chevalier Barley. 



Total 4678 3362 1-390 58-18 



We may say that the ratio LHjRH is hereditary though right- and 

 left-handedness themselves are not. 



Further confirmation was obtained at the same time of another 

 conclusion previously stated : viz. that " The same ratio sub-sists among 

 the seedlings whether produced from the odd or the even rows of seed 

 on the parent ear" (p. 50.5). In the present experiments the offspring 

 were as follows : — 



TABLE 111. 



Total 3569 2557 1-396 58-26 



The totals obtained for all the varieties of two-rowed Barley studied 

 up to the present are as follows: — ^11,185 LH, 7980 RH. Ratio 

 LH/RH =14,016. Percentage LH = 58-3Q2. 



1 Compton, 1910, p. 497. 

 = Ihiil. p. 499. 



