PREFACE TO FOURTH EDITION 



Owing to the increased popularity of this work as a text-book 

 amongst students attending the Agricultural Colleges (both Home 

 and Colonial), the Third Edition issued in 1908 has been taken up 

 so readily that a Fourth Edition has already been called for. 



For technical reasons it has been found necessary to redraw all 

 the Plates. This has been ably accomplished by Mr. D. C. Bluett, 

 of Prestwood, Great Missenden ; and as the Author holds strongly 

 to the old view, that the Eye is more faithful than the Ear, a few 

 more typical illustrations with reference to the horse have been 

 added, viz. : ' Choking,' ' Lockjaw,' ' Loop Twist and Knot of the 

 Small Intestine,' 'A Collection of Intestinal Calculi,' 'Rheumatic 

 Periostitis of the Neck Bones,' ' Fracture of the Long Pastern,' 

 ' Parasites,' etc. 



The text has also been carefully revised throughout, and many 

 paragraphs enlarged, whilst special reference has been made to the 

 new mode of treatment and prevention of disease by Vaccine and 

 Serum Therapy, or the inoculation of animals with specially pre- 

 pared Vaccines and Serums. 



It is hoped that the improved form in which the work is now 

 issued will make it even more useful in the future than it has proved 

 in the past. 



HENRY THOMPSON. 



ASPATRIA, 



January, 1913. 



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