TO 



SIR BENJAMIN COLLINS BRODIE, BART., 



D.C.L., F.R.S., ETC., ETC., 



CORRESPONDING MEMBER OF THE INSTITUTE OF FRANCE, 

 SKRJEANT SURGEON TO THE QUEEN, 



WHOSE MIND, 

 EARLY TRAINED IN PHYSIOLOGICAL RESEARCHES, 



HAS BEEN DEVOTED 



THROUGH A LONG LIFE OF EMINENT USEFULNESS 



TO THE PRACTICE AND IMPROVEMENT 



OF THE HEALING ART, 



THIS WORK IS DEDICATED 

 BY 



THE AUTHORS. 



