INHERITANCE IN RAGE HORSES 97 



greyness and will beget none but grey offspring, 

 while others are impure and may beget both greys 

 and bays among their foals. But we think there 

 may possibly be a difference more than can be ex- 

 pressed in the unqualified symbols D D and D R. 

 It is conceivable that a D R grey horse carrying 

 greyness and bayness may be foaled of a different 

 colour to a horse carrying greyness and chest- 

 nutuess, or greyness and roanness. Moreover, some 

 factor, which may be independent of any colour 

 factor, may exist, which determines not the colour 

 but the precise stage at which the colour-change 

 will occur. 



There is one statement in Mr. Bunsow's article 

 which calls for some comment, from the national 

 standpoint. It is that relating to the scientific 

 accuracy with which the details of the Prussian 

 Government's Stud Books are kept. The matter of 

 horse-breeding in Germany is one which is dealt 

 with on as sound and as scientific a basis as possible. 

 We should hesitate to say that it was perfect in all 

 respects ; but there is no question, we think, that 

 their system is more precise and accurate in its 

 records than ours. The details of their work 

 appear to be done with the characteristic 

 Teutonic thoroughness. There is little doubt 

 either that as soon as the significance of the 

 Mendelian principles has been fully grasped and 

 their application to the breeding of coat colours in 

 horses has been demonstrated — as we hold to 

 be the case — those who are officially respon- 

 sible for the conduct of the Prussian Government's 



