PREFACE. 



THvURING a long experience in teaching veterinary medicine 

 -L^ and surgery in Cornell University, the author felt the urgent 

 need of a compend on the subject, written from the American 

 standpoint and having special reference to the American live stock 

 industry. This led to the production of the Farmer's Veterinary 

 Adviser, which has been well received, and has, up to the present, 

 passed through ten editions in the United States, besides the un- 

 authorized editions published in Canada and Great Britain. 



In entering upon a larger field as Director of the New York 

 State Veterinary College, and professor of medicine and sanitary 

 science, he aims at producing a work which will meet the needs 

 of the American student and practitioner. The special phases of 

 animal pathology in America, the diseases peculiar to our soil, 

 and the parasites that prevail here, but are unknown in Europe, 

 demand consideration from the American point of view. The 

 special features of our breeding, grazing and feeding industries, 

 and of the dairy, over our great extent of territory, and the 

 varying influence of soil, water, climate, altitude and traffic, the 

 scope and limitations of our interstate traffic, and our special rela- 

 tion to the old world in the matter of meat products, combine with 

 other conditions in demanding a somewhat different treatment of 

 the subject from that which we find in European publications. 

 Then, too, the recent extraordinary advances in the field of 

 bacteriology and sanitary science, which have virtually revolution- 

 ized modern medicine, and are an earnest of .still greater advances 

 in the near future, demand a work which shall, as far as pos- 

 sible, .set forth the present advanced status, and thus lay a solid 

 foundation to intelligently follow, if not to lead, in the imminent 

 advance. As a contribution to this, the present volume, the first 

 of a series, is offered to students, practitioners and scientists by 

 their friend. 



The Author. 



New York State Veterinary College, 



Cornell University. 



October, 1896. 



