jSjumim (totoitrs 



AN ESSAY 



TO WHICH WAS AWA 



THE SECOND PRIZE OF THE BOYLSTON MEDICAL 

 OIETY FOR 1867. 



BY F. K. STURG1S, 



HOCSK Si;K<iK()N O!' 1'ITK MASSACTtrSETlS OFNKHAL Hi,-PITAL. 



OTIS ItESPON 



|lrtntcb for 



CAMBRIDGE: 



PRESS OF JOHN WJi.SON & SON. 

 1867. 





