1890 PHYSIOLOGICAL SELECTION 217 



* Adam's eye ' hybrid. If so, it would now be of more 

 importance than ever in relation to Weismann. By 

 the way, he is sorely put to it in the case of plants 

 which reproduce themselves not only by cuttings, but 

 even by leaves. Here he is bound to confess that his 

 germ-plasma occupies all the cellular tissue of the 

 entire plant. But if so, how in the world does his 

 germ-plasma differ from gemmules ? 



There ! I did not intend to write you anything 

 of a letter when I began, but have gone on and on 

 till it is well for you that the second sheet is coming 

 to an end. 



Yours ever, 



G. J. BOMANES. 



P.S. — Any contributions to Correvon's garden 

 (however small) would be thankfully received by him. 

 Possibly his garden may be of some use to English 

 botanists ; if so, you might send the hat round, and 

 collect any coppers that fall. 



To Professor Tliiselton Dyer. 



18 Cornwall Terrace, Regent's Park, N.W. : January 7, 1889. 



My dear Dyer, — Knowing what a busy man 

 you are, I never expected you to answer my last 

 letter, and therefore it has come as an agreeable sur- 

 prise. For no doubt you will believe me when I say 

 that I value much more communications which are 

 opposed to physiological selection than those in its 

 favour ; the former show me better what has to be 

 done in the way of verification, as well as the general 



