An Introduction to a Biology 



haul this machinery ; you want a man who is himself en- 

 gaged in the business of investigation. I do not, of course, 

 go so far as to say that an investigator, to achieve anything, 

 must be a philosopher as well ; nor that a philosopher to 

 achieve anything at all must be an investigator as well ; 

 but that the best investigator is he who has a dash of the 

 philosopher in him, and the best philosopher is he who has 

 a dash of the investigator in him. 



[From an unpublished paper, " The Art of Breeding," 

 February, 1911.] 



Those who take part in discussions as to the most profit- 

 able way of spending public money on the improvement of 

 farm live stock may, in nearly all cases, be placed in one of 

 two perfectly distinct categories, namely the scientific and 

 the practical. 



The Practical Man believes that the success of such 

 schemes is assured if the planning and the carrying out of 

 the breeding experiments are in the hands of one who has 

 devoted his life to the breeding of live stock. The Man of 

 Science, on the other hand, believes that we have little 

 more to learn from the Practical Man, and that the greatest 

 hope of further improvement lies in the application of scien- 

 tific methods to the problems of practical breeding. 



I believe that neither of these views contains the whole 

 truth ; that both of them contain part of it ; but that the 

 sum of truth made up by the two falls very far short of the 

 whole truth about the matter. I have intended to suggest 

 in the title of this paper the direction in which the residue 

 is to be sought. . . . 



It has not been my lot, though it always has been, and 

 still is, my wish to follow the profession of a farmer. I 

 cannot therefore deal with breeding from the standpoint 

 of one who earns his bread by it. My study of breeding has 

 been from the purely scientific standpoint ; and I propose 



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