2 ADVERTISEMENT. 



sense of gratitude I feel towards Professor Owen as well for 

 tills as for tlie many other favours I have received at his hands 

 during a period of nearly ten years : and I shall endeavour, to 

 the best of my abilities, to discharge my present undertaking in 

 a manner which may not be unworthy of the importance of the 

 subject. 



WILLIAM WHITE COOPER. 



2. Tenterden Street, 

 Hanover Square. 



