102 



From these experiments and the Mendel-chromosome com- 

 bination of theories, we are now able to analyse supposedly 

 pure animals and prove and name their specific impurity. We 

 are doing it now with swine purchased from reputable foreign 

 breeders with the exactness and surety of a chemical laboratory. 



Many experimenters are using the same methods under dif- 

 ferent terms. The "allelomorphs" of Bateson and Castle and 

 the "factors" of other experimenters are proof of the chro- 

 mjosomes' action. The direct experiments of myself that have 

 cost me far more work than a doctor's title, have enabled me 

 to say that the individual, independent chromosomes of the 

 male and female nuclear colonies are the things that determine 

 units of heredity. 



With this chromosome-Mendelian-unit-seggregation-idea, we 

 are synthesizing the units from various individuals as does the 

 chemist; and building animals to "blue print" as does the archi- 

 tect. And when built, we then with these same principles and 

 some empirical knowledge test the individual as to the purity 

 and homogeneity of its inner germs. 



With these we do not fear latency, reversion, or throzving back, 

 and can create reversion at will when so desired. W'e can for- 

 mulate new "made-up breeds" to suit the economy or the fancy. 

 We can fix these breeds in the purity of their characters with 

 certainty and precision, without the long line of inbreeding, 

 as used by disciples of Aristotle. We are working in an ad- 

 vanced field on a dim trail, and must use every finding from 

 kindred experimenters that will lead the way. 



The climatic mutants from Tower's potato bugs, the mutants 

 of Webber's frozen orange stump, the variants from McDougal's 

 chemical plants, and the feather-pigment researches, by Rid- 

 dle, are all telling things that relate to our work of creating 

 pigs to order ; and show that life is only a chemical laboratory 

 and subject to chemical and physical laws. 



Weismann brought Mendelism into unity, by show- 

 ing that albinos were of no pigment ; and whites, like white 

 hogs and white leghorns, an over oxidation of pigment, a fad- 

 ing out to white. This explained the dominance of iii}hite hogs, 



