Manchester Memoirs, Vol. I. (1906), No. \\. 31 



through which the experiment is continued, because in its 

 simple form that Law states that the result, for example, 

 o^ DRxDR will always be the same whether the mating 

 of hybrids takes place in F^ or /'V The Mendelian 

 hypothesis in this simple form may or may not be right ; 

 and I for one think that it is not. But this does not 

 damage my argument. My point is that you can deter- 

 mine the properties of the hybrids in different generations 

 — supposing that they are not the same in all ; and having 

 acquired this knowledge you can then return to the 

 counters and see whether the result of mating your 

 material at random can be described by the Law of 

 Ancestral Inheritance. What I want to make clear is 

 that the knowledge of heredity acquired by the Mendelian 

 is deeper ; is nearer the phenomena theinselves, than is 

 that acquired by the biometrician ; and is such that the 

 latter if he is inclined can use it as material with which 

 to test the Law of Ancestral Liheritance, without the 

 labour of conducting a breeding experiment. 



Having devised my method, therefore, I discovered 

 that it was unnecessary to use it. So f abandoned it ; in 

 the case both of the mice and of the peas. I am now 

 investigating the properties of the various kinds of 

 individuals in various generations in both cases, accumulat- 

 ing information (of a physiological nature) which will be 

 available to the biometrician for use in testing the Law 

 of Ancestral Inheritance. 



4 {e). Why do zvhite sheep eat more than black ones ? 



I was asked the other day this well-known riddle : 

 and as I had forgotten the answer I was told it : " Because 

 there are more of them." 



The supplying of the answer never provokes a laugh, 

 yet the relation between it and the question is full of 



