258 PRINCIPLES OF STOCK-BREEDING. 



mare to the same stallion had the head and ears of its 

 sire. 



A repetition of the procreative function was appar- 

 ently necessary, on the part of the stallion, to over- 

 come the transmitted influence of the jack remaining 

 from a former impregnation. Similar cases have fre- 

 quently been observed by persons engaged in mule- 

 breeding. 



" A pure Aberdeenshire heifer was served with a 

 pure Teeswater bull, by which she had a first-cross 

 calf. The following season the same cow was served 

 with a pure Aberdeenshire bull ; the produce was a 

 m?ss-calf, which, when two years old, had very long 

 horns, the parents being both polled. 



" Again, a pure Aberdeenshire cow was served, in 

 1845, with a cross-bull that is to say, an animal pro- 

 duced between a first-cross cow and a pure Teeswater 

 bull. To this bull she had a cross-calf. Next season 

 she was served with a pure Ayrshire [Aberdeenshire ?] 

 bull ; the produce was quite a cross in shape and color." ' 



Mr. Shaw, of Leochel-Cushnie, "put six pure- 

 horned and black-faced sheep to a white-faced horn- 

 less Leicester ram, and others of his flock to a dun- 

 faced Down ram. The produce were crosses between 

 the two. In the following year they were put to a 

 ram of their own breed, also pure. All the lambs 

 were hornless and had brown faces. Another year he 

 again put them to a pure-bred horned and black-faced 

 ram. There was a smaller proportion this year im- 

 pure ; but two of the produce were polled, one dun- 



1 Quoted from Dr. Harvey's paper on " Cross-Breeding," in the 

 Journal of the Highland Agricultural Society, 1857-'69, p. 26. 



