TRANSLATOR'S NOTE. 



IN translating this work of Professor Danysz from French 

 into English, an attempt has been made to preserve carefully 

 the original meaning. The original work contains much 

 repetition arising from the desire to emphasize and elucidate 

 the author's theories and deductions on the evolution of 

 disease: the translation also contains repetition but the 

 translator has taken the liberty of omitting sentences, para- 

 graphs and, in certain instances, whole sections, in order to 

 present the book to the American profession in a more read- 

 able form. In particular, the case reports in the second 

 section of the second part have been greatly shortened and 

 many have been omitted. 



In this book Professor Danysz has traced in a clear and 

 logical manner the various stages in the development of acute 

 infectious diseases; and proceeding along the same course, 

 has developed an interesting theory of the evolution of 

 chronic morbid states whose etiology and pathogenicity are 

 today so little understood and whose treatment is therefore 

 as difficult as it is unsatisfactory. 



The book should be of interest to those who recognize 

 the importance of a comprehension of the principles under- 

 lying the study and treatment of disease. 



The translator wishes to thank Mr. G. S. S. Playfair for 

 much valuable assistance in the translation. 



F. M, R. 



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