PREFACE ix 



description of the symptoms and diagnoses of diseases is 

 required, the reader must be referred to standard works 

 on these subjects, the primary object of this book being 

 the making and the administration of vaccines. 



An exception, however, has been made in the case of 

 two diseases — namely, tuberculosis and swine fever — where 

 a fuller descriptive detail has been gone into, owing to 

 the prominence given to these two affections by the State 

 and the veterinary surgeon of the present day. My 

 grateful thanks are due to Sir Almroth Wright for kindly 

 admitting me to the Vaccine Department of St. Mary's 

 Hospital, where I obtained much useful and practical 

 information ; and to Dr. Poels for so courteously giving me 

 access to the State laboratories and clearly describing the 

 technique of sero-vaccine therapy as practised at Rijks- 

 seruminzichting, Rotterdam. I am also indebted to Messrs. 

 Rose and Carless, Dr. Hewlett, Dr. Emery, and Mr. Jowett 

 for the loan of the various photographs appearing through- 

 out the book. For the illustrations of instruments and 

 apparatus I have to thank Messrs. Arnold and Sons and 

 Messrs. Grallenkamp. 



Finally, I have to thank Messrs. Bailliere, Tindall and 

 Cox, for their courtesy in making alterations and cheerfully 

 carrying out suggestions which appeared to me to be 

 necessary as the work was going through the press. 



W. S. 



Feiarn House, 

 Bridgewater, 



October, 1913. 



