PREFACE TO THE FOURTH EDITION. 



The Third Edition liavino- become exhausted, a Fourth has 

 been issued. The Author has not found it necessary to make 

 any alterations or additions to the text. 



W. W. 



Xew Veterinary College, Edinburgh, 

 Septemher 1882. 



PREFACE TO THE THIRD EDITIOX. 



The reception which former editions of this work have met with, 

 lias been a source of gratification to the Author, and has 

 encouraged him in furtlier efforts to promote the study of 

 Veterinary Science. "While he has found it necessary to revise 

 and enlarge the companion volume on Veterinary Medicine, a 

 new edition of which has been simultaneously issued, nothing 

 of importance has transpired in the sphere of Veterinary Surgery 

 to necessitate a similar revision of this work ; the only alteration 

 made being a slight rearrangement in the chapter on ^lelanosis. 



W. W. 



New Veterinary College, Edinburgh, 

 Sejylember 1879. 



