PREFACE. 



Several of my friends have complained to me that my 

 writings are so scattered that they have been unable to refer to 

 them when they wished to do so. I have therefore collected 

 and reprinted them. At first, I intended to publish them 

 in two volumes, but I found that they naturally fell into two 

 series, the first containing chiefly the results of experimental 

 research in the laboratory, and the second those of clinical 

 work. It is unsatisfactory to possess only one volume of a 

 work, but one reader may be more interested in experimental, 

 and another in clinical work, and so each might wish to possess 

 the series dealing with the subject he desires. In some 

 instances, the same paper appears in two languages, for I found 

 on one occasion, at least, that the work described in an English 

 paper had been ignored on the pretext that the writer had not 

 access to the German original. One of the first things to 

 strike a reader will be the number of papers with a joint 

 authorship. One reason of this is that I like working with 

 others who are interested in the same subject as myself, and 

 thus have written conjointly with Dr. A. B. Meyer (now 

 Director of the Eoyal Zoological Museum at Dresden), Sir 

 Joseph Fayrer, Mr. Henry Power, and Mr. D'Arcy Power. 



Two or three years after beginning to lecture on Materia 

 Medica and Therapeutics at St. Bartholomew's Hospital, I tried 

 to institute a pharmacological laboratory there. The place 

 which I got for this purpose was about 12 feet by 6, and 

 formerly had been used only for washing dishes ai.d jars in 

 the museum, but a table on one side served to hold the 

 apparatus, and I got some students to work there with me. 

 One research was that of Mr. Walter Pye, on Casca, and the 

 other that of Mr. Tait, on Nitro-glycerine. The pulling down of 

 this laboratory on account of the rebuilding of the Medical 

 School prevented me from pursuing my plan of getting a number 



