LECTURJ: II. 71 



acquaintance with their habits, or peculiar 

 wants and desires. We cannot, therefore, so 

 well perceive the reasons of those varieties 

 of formation we discover, nor judge of their 

 adaptation to the peculiar exigencies of 

 the being that possesses them. In many 

 instances also the organization is extremely 

 obscure, and in some it is probable that it 

 never can be developed. 



There are minute animals, the motions of 

 which are extremely vivacious, and in which 

 all the processes of life are carried on with 

 great celerity and vigour, yet no organiza- 

 tion can be detected in them, even by the 

 aid of the microscope. We are, therefore, 

 obliged to conclude either, that there may 

 be organization which is wholly undiscern- 

 ible ; or that life can execute its functions 

 unconnected with those kinds of organiza- 

 tion which we observe in animals in general. 

 Whatever may be the structure of animals, 

 we cannot however but perceive, that each 

 possesses means of procuring sustenance 

 adequate to its wants ; so as to ensure its 

 perfection of health and growth, and powers 



F 4 



