viii HISTORICAL INTRODUCTION 



compiling the Index accompanying Volume I, and for 

 other helpful details, credit is due, and thanks ex- 

 tended, to Miss Eda Van Guelpen, of the author's staff. 



The foregoing was written in 1918, at the time of the 

 completion of the manuscript of Volume I (January 1, 

 1918). It was then expected that publication of Vol- 

 ume I would follow at once, but this was interrupted 

 by reason of disturbances due to the World War. 



The result has been that only in April, 1920, was it 

 desirable to submit to the Association, at its annual 

 meeting, the manuscript of Volume I. This the Asso- 

 ciation promptly accepted, and suggested the appoint- 

 ment of a committee to take charge of its publication. 

 President Wm. A. Sailer named as such committee the 

 following members: 



Messrs. A. R. L. Dohme, J. M. Francis, John Uri 

 Lloyd, Caswell A. Mayo and W. J. Woodruff, with 

 Professor Lloyd as Chairman. 



This committee delegated the work of typography, 

 binding, etc., to a sub-committee consisting of 



Messrs. Mayo, Lloyd and Woodruff, with Dr. Mayo 

 acting as Chairman. 



Mr. Mayo took charge of the publication, and the 

 members of the committee read the galley proofs. 



To all members of these Committees, as well as to 

 the members of the Association generally, who without 

 exception have not only made no complaint, but have 

 cheerfully given all assistance possible in furnishing 

 data needful, the writer desires to extend his earnest 

 thanks. 



As a final interruption to the progress of the work, 

 on the very day when came to the author the galley 



