AOOCLOGY. 
Zooroey is the science which treats of materi- 
al organized beings, which are endowed with the 
sentient principle.* 
Tt is generally true, that animals differ from 
vegetables in possessing locomotive, as well as 
sentient, powers. ‘This is a good distinction be- 
tween the ov and the ocak. [But is very deficient 
when applied to the ists and the sensitive plants. 
Animals receive their food into an internal cav- 
ity or cavities, which is so modified as to furnish 
the fluids which supply the wants of the system. 
And probably no substance is received as the food 
of animals, which has not previously been in an or- 
ganized s'ate. Whereas vegetables receive inor- 
ganic maiter for food, as well as that which has 
been organized ; and their food is chiefly received 
through tubular radicles, or pores of leaves, which 
have the power to direct their courses or pores to- 
wards water, air, light and heat. 
All animals have the sense of feeling. But 
they have no particular organ for that sensation 5 
it depending on papille at the ends of nerves 
which terminate in every part of the skin. Al} 
vertebral animals have four organs ofsense. Each 
ergan is adapted to its particular effice. One fer 

*“ Sentient principle” is not well defined, and no definition of an an- 
imal has come to my knowledge _ which is ‘satisfactory. “Organized 
being”’ is still wanting in a settled accurate meaning. The student is 
referred to large treatises on subjects of natural history, for ingenious 
attempts at definitions and nice distinctions. 
