THE following veiy appropriate and interesting Lecture^ 

 was delivered by Dr. Rush, at the request of the President 

 of the Philadelphia Agricultural Society, in compliance with 

 motives impressed by the recommendations of that Society in 

 their premiums. He has permitted it to be printed among 

 their Memoirs, at the request of the members of that Society, 

 who attended its deliveiy. 



An Introductory Lecture to a Course of Lectures^ upon the 

 Institutes and Practice of Medicine^ delivered in the Uni- 

 versity of Pennsylvania^ on the 2nd of November^ 1807 ; 

 upon the duty- and advantages of studying the Diseases of 

 Domestic Animals^ and the Remedies proper to remove them* 

 By Benjamin Rush, m. d. 



Gentlemen, 



THE science of medicine is related to every thing. A 

 mere physician, that is, a physician who knows nothing but 

 the sciences which are supposed to belong exclusively to his 

 profession, is a non-entity. To deserve that title in its ex- 

 tensive import, it is necessaiy for us to know something of the 

 principles and practice of every art, and pursuit oi man. There 

 is scarcely one of them that does not furnish some useful facts, 

 or striking analogies, which may be applied to practical pur- 

 poses, or to the support of some important principle in medi- 

 cine. Even the science of morals is capable oi affording aid 

 to the healing art by its influence upon the understanding 

 through the medium of the passions. It produces this effect 



