vi PREFACE BY THE TRANSLATOR. 



I take occasion here to acknowledge my obligation to M. Barrier 

 and Messrs. Asselin and Houzeau for the loan of the plates and cliches, 

 and also to express my gratitude to the friends who have assisted me 

 in my work, and particularly to the publishers for their generous as- 

 sistance, for the ability with which they have executed their portion of 

 the undertaking, and for the interest they have manifested not only in 

 this work, but also in all publications pertaining to veterinary science. 

 Nor must I forget, finally, to express my obligations to Mr. E. R. 

 Jones for his conscientious care in reading and correcting the proof. 



Simon J. J. Hakgee. 



205 North Twentieth Street, Philadelphia, 

 December 3, 1891. 



