TO 



SIR JAMES M'GRIGOR, M.D. F.R.S. K.CT.S. 



DIRECTOR GENERAL 



OF THE 



ARMY MEDICAL DEPARTMENT. 



AS THE FRIEND OF EVERY PURSUIT 



WHICH CAN CONTRIBUTE IN THE MOST REMOTE DEGREE 



TO THE INCREASE OF NATURAL KNOWLEDGE, 



AND PARTICULARLY TO THE PERFECTION OF MEDICAL SCIENCE, 



BY EXTENDING OUR VIEWS OF 



THE PRINCIPLE OF LIFE, AND OF THE VARIOUS FUNCTIONS AND 



HABITUDES OF ORGANIZED BODIES, 



AS INFLUENCED BY DIFFERENCE OF ANATOMICAL STRUCTURE, 



THIS WORK 



IS INSCRIBED 

 BY HIS VERY FAITHFUL SERVANT, 



THE AUTHOR. 



