IV INTRODUCTION 



I am indebted for much valuable service in the preparation of this volume 

 to my secretary, Miss M. A. Clarke. 



In anticipation of the fact that many points in regard to these affec- 

 tions will be searched for by the reader, and to facilitate this, an endeavor 

 has been made to add a comprehensive and full general index. 



Julius L. Salinger. 

 1729 North 42nd Street, Philadelphia. 



