ON ARTIFICIAL INSEMINATION. 253 



is economy of service in the horse, since by 

 the process two mares which happen to be 

 in " use " at the same time may often be 

 impregnated from one service. The genera- 

 tive powers of certain highly prized racing 

 sires might thus be conserved and utilised, 

 to the profit alike of owners and subscribers ; 

 and in this way an aged hero of the turf 

 ' might still beget as many foals as a younger 

 and more vigorous sire. 



There are many causes of sterility in mares, 

 which (this not being in any way a veterinary 

 work) we need not enumerate or discuss, 

 but will content ourselves with saying that 

 convincing evidence has now been collected 

 to prove that most of these can be remedied 

 by means of insemination, the percentage of 

 prolific mares being by artificial aid as ninety 

 to fifty before its adoption. Nor does it lie 

 within our scope to describe the operation. 

 Suflice it to say that it is not a complicated 

 one, though it must, of course, be perfoi-med 



