1S90 EXPEEIMENTS IN GEAFTING 213 



One thing only I have forgotten to say, viz. that 

 nothing can be argued against the theory from the 

 fact of hybridisation occurring in cases where, 

 according to the theory, it ought not to occur. This 

 argument only becomes valid where it is found that 

 the resulting hybrids are fertile. In relation to the 

 theory, a sterile hybrid is all the same as a failure to 

 cross. Yours very sincerely, 



G. J. Eomanes. 



P.S. — I forgot to ask you if there would be any 

 facilities in spring at Kew for repeating Adam's graft 

 of purple on yellow laburnum. I want to try this 

 experiment in budding on a large scale because of its 

 importance on Weismannism, should the resulb of 

 any of the grafts go to corroborate Adam's account 

 of the way in which he produced the hybrid. If you 

 agree to the experiments being tried at Kew, perhaps 

 you might let me know whether there are any purple 

 laburnums already in the gardens, or whether I 

 should get the material over from France. But in 

 that case you might also let me know to whom in 

 France or elsewhere I had best apply. However, 

 do not bother to answer any other parts of this 

 tremendous letter, these we can discuss in conversa- 

 tion hereafter. A postcard to answer this postscript, 

 however, is desirable, as then it might be possible to 

 get matters in train for next budding season. 



G. J. K. 



I should much like to meet Churchill. Will you 

 remember to tell me when he comes ? 



