PREFACE TO THE EIGHTH EDITION. 



The present edition of this work has been thoroughly revised 

 and several additions have been made. The whole work has 

 been re-set. The aim of the author was to impart to horse- 

 owners his unrivalled knowledge, acquired in all parts of the 

 world and with every variety of horse. By means of small 

 print, he supplied information on anatomy and physiology to 

 enable a wide purview to be taken of the sciences bearing on 

 the subject, so that all readers could appreciate facts connected 

 with the diseases of horses, and incidentally of other animals. 

 In the former editions authorities of the^ time were quoted 

 from largely, but without giving the names of their books. 

 These names have been omitted from the present edition, 

 except in cases where the reader may be anxiods to obtain 

 further information; or trace the progress of knowledge. 



Another feature of the writing of Captain Hayes was to place 

 horse-owners in a position to appreciate the attitude of 

 veterinary surgeons and other scientists towards disease in 

 general, and particularly those common to both man and 

 horse, thus diffusing knowledge which tends to alleviate the 

 sufferings of both. 



Not the least important of these diseases are those due to 

 protozoa, such as piroplasmosis (tick fever, biliary fever), which 

 causes considerable loss in animals ; still' more important is 

 trypanosomiasis (tsetse-fly disease, sleeping sickness), which is 

 fatal both to humans and animals. The recognition of the 

 causative parasite of surra paved the way for the identification 

 of the trypanosome of sleeping sickness, and improvements in 

 the treatment of the one aid the cure of the other. Tetanus is 

 common to horses and men, so that the horse is used to provide 



