VI PREFACE 



interest in the studj- of comparative pathology and thus render 

 it of more permanent and practical value for those entering 

 into the practice of veterinarj' medicine. 



In selecting the subject matter care has been taken to 

 avoid, as far as possible, the introduction of results concerning 

 which there are controversies. It has seemed best to deal 

 with those facts about which at the present time there is little 

 or no doubt. After the discussion of each disease a few refer- 

 ences to the literature are appended. These are intended sim- 

 pl)' to bring the attention of the student to a few publications 

 respecting the cause and morbid anatomy, considered in the 

 light of modern etiology, of the disease in question and to a 

 few articles containing the results of original research. 



In order not to complicate or unnecessarily expand this 

 text, a knowledge of general pathology and the principles of 

 bacteriolog}' has been taken for granted. 



The difficulties involved in the preparation of such a text 

 are both numerous and obvious. The indication of errors or 

 omissions with any other criticisms that will tend to better 

 the volume and increase its efficiency for the student will be 

 thankfully received. 



V. A. M. 



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