, 



\v 



TO 



PHILIP SYNG PHYSICK, M. D. 



PROFESSOR OF ANATOMY IX THE UNIVERSITY OF PENNSYLVANIA ; 



WHO, BY HIS NATIVE GENIUS, 



HAS GAINED A REPUTATION BEYOND THE POWER OF ACCIDENT J 



WHOSE PROFESSIONAL SKILL, 



HAS LONG BEEN A NATIONAL BENEFIT ; AND WHOSE ARDENT 

 DESIRE OF KNOWLEDGE IS ONLY EQUALLED 



BY HIS SOLICITUDE TO DIFFUSE ITS BLESSINGS, 



THE FIFTH AMERICAN EDITION OF 

 THIS WORK IS MOST EESPECFULLY 



DEDICATED, 





