264 ( astle. 



pole later on, and went there part way. Again it remained for others 

 to ascertain what part of the way he had gone. His own inipiessiou 

 seems to have been that he had gone the whole way. Expert assistance 

 was later required to determine whether his im]nessious had been well 

 founded. 



Some of us who have witnessed this and other similar occurrences, 

 and have had the bitter experience of seeing our first formed hypotheses 

 proved false, have become sceptical about part way work and part 

 way theories. We entertain a suspicion that the genotype theory nuiy 

 b(^ a view of heredity from altogether too low and restricted a point 

 of outlook, and prefer to climb a little higher up the mountain of in- 

 vestigation liefore we place our camera for a final panoramic view of 

 heredit\. 



Bibliography. 



Castle, VV. E., 1912: Some Liological piinciples of animal breeding. The Aiiieiicau 

 Breeders Maf^azine, vol. H, pp. 270 — 282. 



— and JoH.v C. Phillips, 1914: Piebald rats and selectiou; an experimental test of 



the effectiveness of selection and of the theory of gametic purity in Mcndelian 

 crosses. Publication No. 195, Carnegie Inst, of Wash., 5(i pp., 4 plates. 

 H.UinnoouN, A. L., 1911: The interrelation of genetic and non-genetic factors in deve- 

 lojimeut. Verh. d. naturf. Verein Briinn, Bd. 49, pp. 1 — IH. 



— and A.C., 1914: Studies on variation and selectiou. This Zeitschrift, Bd. 11, Heft .-t, 



pp. 145—183. 



