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A TREATISE ON HORSE-BREEDING. 



upon the percentage of foals begotten. We 

 have no official statistics bearing upon this sub- 

 ject in this country, but such as we have from 

 the books of private keepers of stallions abun- 

 dantly prove this position. The condition of 

 the stallion appears to be the controlling con- 

 sideration, and so long as he is strong arid vig- 

 orous his powers of reproduction continue. 

 There may come a time, however, when from 

 overtaxing this power partial or entire loss of 

 virility may ensue. The books of service of Rys- 

 dyk's Hambletonian show the following result: 



This table makes the remarkable showing of 

 1,331 foals begotten by a single horse out of 



