HISTORICAL INTRODUCTION ix 



proof of Volume I (December 15, 1920), came also to 

 him an attack of pneumonia of the most pronounced 

 type. Realizing that to ask the Committee or their 

 Chairman to do more than read the galley proof would 

 be an imposition, he turned to his life-long friend, Pro- 

 fessor Harvey Wickes Felter, M.D., whose experience 

 in materia medica and history of drugs is exceptional. 

 Comprehending the situation, Dr. Felter took upon 

 himself what would have been the author's care as 

 concerns the many final details, for which the author 

 is very grateful. 



Appreciating fully that neither Dr. Felter nor the 

 Committee could overcome faults due to misplaced 

 judgment or errors of interpretation, the author un- 

 reservedly assumes responsibility for the publication's 

 short-comings. JOHN URI LLOYD. 



Cincinnati, April 19, 1921. 



