4 
might exist in endless mazes of incongruity. Ana- 
logies would of course be untraceable. But analo- 
gies are coordinate with differences throughout all 
creation. Therefore in analogies we chiefly trace 
the unity of the designing Cause. Analogies are to 
be found in the relations of whole classes of organ- 
ized beings to different portions of creation. As 
some portions of the globe are constantly subject to 
the rigour of perpetual cold, viz. the arctic circles, 
and the summits of the Alps, Andes, and Himalaya; 
others to equal severity of heat; so animals and 
plants of all classes exhibit peculiar adaptations to 
each condition of temperature. Land, air, and water 
are appointed media for purposes of locomotion. 
Legs and feet, and wings, and fins, and paddles, as 
in the turtle, and sails, as in the nautilus, and ar- 
gonauta, and velella, and spirula, perform analogous 
offices in each. Here are analogies of wholes and of 
parts. Analogies appear singly in wholes, but are 
duplicate or multiplied in the complication of parts. 
Thus in the instance of teeth, as the lion is to the 
ant-eater amongst mammalia, so is the crocodile to 
the frog amongst amphibia, Xc. I defer further de- 
tail to a particular illustration of the synoptical table 
of analogies. It may be here observed, however, that 
in such cases as that last instanced the double ana- 
logy is manifested in the continued duplication of 
excess and defect through every class. 
As to the possible extent of physical analogies, 
there seems to be no clue to direct our judgment 
on the superficies of nature. They are discoverable 

