30 THE METHODS AND 



hooded. One of the possible combinations 

 is missing. If you examine this series of 

 facts you will find there is only one possible 

 interpretation: namely that the ingredient 

 which turns the flower purple alkalinity, 

 perhaps we may call it never goes into the 

 same germ-cell as the ingredient which makes 

 the standard erect. There are plenty of ways 

 of testing the truth of this interpretation. 

 For example, it follows that the purple 

 erects from such a family will in perpetuity 

 have offspring 1 purple hooded : 2 purple 

 erect : 1 red erect; also that all the white 

 hooded crossed with pure reds will give 

 purples, and so on. These experiments have 

 been made and the result has in each case 

 been conformable to expectation. 



Between these two factors, the purpleness 

 and the erectness of standard, some antago- 

 nism or repulsion must exist. In some way 



