book, accurate within the limits set for it. To make 

 it possible for owners of the volume to amplify the Hst 

 of terms and names given, the publishers have inter- 

 leaved blank pages, and it is hoped that this will prove 

 valuable for those who use the book. 



THE EDITORS. 

 Ithaca, December 1, 1920. 



ACKNOWLEDGMENT 



The editors wish to express to their colleagues and 

 friends their appreciation for helpful criticism in the 

 selection of the proper equivalents and in the reading 

 and correcting of the proofs. 



