1 10 Grease, 



sequently becoming stretched^ the ulcers are torn open afresh^ 

 thereby excessive pain is, inflicted upon the inflamed part ; and^ 

 thuSj he continues to hop for some seconds upon three legs, from the 

 dread of setting- the diseased Hmb upon the ground. 



I have thus sketched all the circumstances, which are most mate- 

 rial to be known, \yith respect to the cure as well as prevention, of 

 this common winter disease. But the medical and philosophical rea- 

 der, would probably tax me with a culpable omission were I to pass 

 over in silence, the important fact of the Grease in Horses, having 

 laid the foundation of one of the greatest public blessings in this or, 

 perhaps, any other age. 



I allude to Doctor Jenner's immortal discovery of the Cow-pock hav- 

 ing the property of securing the human frame, against the infection of 

 small Pox. For it is not only a fact, that the Cow-Pock originated 

 from the conveyance of the matter of Grease, from the heels of diseased 

 Horses, to the teat of the Cow, but it is also one equally well esta- 

 blished, that the disease called Cow-Pock, may just as readily be 

 communicated to the human constitution, by inoculating with the 

 matter of Grease, as with that taken from the ulcerated teat of the 

 cow. In this point of view, therefore, the disease ought to have been 

 called the Horse, rather than the Cow- Pock; but, inasmuch, as 

 names have great influence upon the multitude, there was, perhaps, 

 policy in giving it the latter, in preference to the former designation. 



