IV PREFACE 



foi" practical information on the naturo of the same. For these, and 

 other reasons which might be alluded to, there exists a necessity for 

 a work of this kind. 



In the composition of the work I have endeavored to be as brief 

 and practical as possible. I have also, for the reader's instruction, 

 introduced a number of cases which have occurred in my own 

 practice, which may aid the practitioner in treating others. 



GEO. H. DADD, V. S. 



