ACKNOWLEDGMENT. 



This volume contains a series of lectures, delivered before 

 the students of the Chicago College of Dental Surgery and a 

 number of practitioners who were ticketed especially for this 

 course. The Lectures now appear in their present form 

 through the co-operation and kindly assistance of the Officers 

 and Faculty of that Institution, to all of whom I gratefully 

 acknowledge myself indebted for many favors. 



THE AUTHOR. 



