PREFACE 



No apology seems called for in presenting to English-speaking 

 veterinary surgeons and students a treatise on the diseases of 

 cattle. To those entrusted with the onerous task of preventing or 

 curing disease in cattle, sheep and swine the scantiness of 

 permanent literature dealing with the subject must always have 

 proved a matter of some embarrassment, while to teachers and 

 students alike the want of a concise and modern text-book has 

 long been a difficulty of the first order. It is hoped that the 

 present volume may go some way towards remedying this state of 

 affairs. 



As on previous occasions, the writer has freely availed himself 

 of foreign sources of information. Two years ago he purchased 

 the literary rights in Professor Moussu^s " Maladies du Betail," 

 which had even then attained an European reputation, and which 

 forms the backbone of the present volume. To obtain further 

 information, the more important German treatises have been laid 

 under contribution, while all accessible English, American, and 

 Colonial literature of recent date has been referred to. (The 

 references practically extend up to the moment of writing— the 

 latest being June, 1905.) In this way the work may in some 

 degree claim to have assumed an international character. The 

 extent of the additions is indicated by an increase in the number 

 of illustrations of 140, and of the text of nearly 50 per cent. 



Professor McQueen has performed the greatly- valued service 

 of reading proof-sheets and advising the writer as the book passed 

 through the press. 



To Dr. Salmon, of the United States Department of Agri- 

 culture, special thanks are due for his generous permission to 

 quote from the annual reports of that body. 



Other acknowledayBflBifiUfiilIiifi-£iIU.nd in the text. 



|(>2336 



