98 APPENDIX. 



ment of science, which were afterwards carried into 

 happy effect. In consequence of ill health, he had 

 been for some years gradually retiring from the 

 practice of medicine, and had his life been spared a 

 little longer, he would probably have confined himself 

 to his lectures, and indulged those studies, which 

 he loved, and for which he would then have found 

 leisure. He had completed the Biography of his 

 friend and colleague. Dr. Shippen, and had it in con- 

 templation to write a Memoir on the life of the late 

 professor Barton. He was industriously inquiring 

 into the natural history of our western country, and 

 had commenced a ooUection of subjects for the in- 

 vestigation of Comparative Anatomy, to which he 

 was incited by his friend Correa da Serra, whose 

 name is identified with science both in Europe and 

 America. He had been accustomed to correspond 

 with men of distinguished talents, both at home and 

 abroad. Among these are found the names of Hum- 

 boldt and Soemmering, in Germany ; Camper, in Hol- 

 land ; Michaud, in France; Sylvester, in Geneva; 

 Doctor Pole and Doctor Thomas C. Hope, in Great 

 Britain ; and in the United States, of the late presi- 

 dent Jefferson, Correa da Sarra, Warren, and most 

 others conspicuous in literature. In 1815, he was 

 elected an honorary member of tlie Literary and Phi- 



