66 CORRESPONDENCE OF THE MIRRORS. 



activity of the milky glands is apparent on a careful 

 examination of all the cases. When the lower part 

 of the mirror is large and broad, with the hair grow- 

 ing from below upwards, and extending well out on the 

 thighs, it indicates that the arteries which supply the 

 milky glands, and which are situated just behind it, 

 are large and capable of conveying much blood, and 

 of giving great activity to the functions of secretion. 



Now, in the bull, the arteries which correspond to 

 the mammary or lacteal arteries of the cow are not 

 so fully developed ; and the escutcheons are smaller, 

 shorter, and narrower. Guenon applied the same name, 

 milk-mirror, to these marks in the bull ; and the natural 

 inference was, that there should exist a correspondence 

 or similarity in the mirror of the bull and the cow which 

 are coupled for the purpose of producing an offspring 

 fit for the dairy, — that the mirror in the bull should be 

 of the same class, or of a better class than that of the cow. 



It is confidently asserted by the advocates of Gue- 

 non's method, and with much show of reason, that 

 the very large proportion of cows of bad or indifferent 

 milking qualities, compared with the good, is owing to 

 the mistakes in selecting bulls without reference to the 

 proper marks or points. As to the transmission of the 

 milk-mirror, it has been found in many cases that bulls 

 sprung from cows with good mirrors had smaller and 

 more heart-shaped mirrors, spreading out pretty broad 

 upon the thighs. Pabst, a successful German breeder, 

 says that he has used such bulls for three years, anil 

 that the milk-mirrors were transmitted in the majority 

 of the male progeny, and in nearly every case very 

 large and beautiful mirrors were given to the heifer- 

 calves. A son of the bull with which he began was 

 serving at the time of which he speaks, having a mir- 

 ror more highly developed than his sire, and the 



