X PKKFACE. 



out the necessity of combining the study of 

 comparative pathology with that of medicine, 

 I shall feel that I have contributed some- 

 thing which may favour my claim to be 

 enrolled among the citizens of England. 



This book, as may easily be seen, was 

 originally written in my native language. 

 A few kind and obliging friends more par- 

 ticularly Mr. Taylor Sinnett, Drs. Clapton 

 and Gervis, of St. Thomas's Hospital, and 

 Mr. Berridge, of the British Museum have 

 rendered me the greatest assistance in the 

 translation. Without the guidance of such 

 competent auxiliaries I could not have per- 

 formed my arduous task. 



I therefore beg to return to those gentle- 

 men, and to all those who have assisted me 

 on this occasion, my sincerest and most grate- 

 ful thanks. 



H. B. 



