282 NATURAL THEOLOGY. 



indeed, without dissection, is capable of being ap- 

 prehended by every understanding. This correla- 

 tion of instruments to one another fixes intention 

 somewhere : especially when every other solu- 

 tion is negatived by the conformation. If the 

 bladder had been merely an expansion of the 

 ureter, produced by retention of the fluid, there 

 ought to have been a bladder for each ureter. 

 One receptacle fed by two pipes issuing from dif- 

 ferent sides of the body, yet from both conveying 

 the same fluid, is not to be accounted for by any 

 such supposition as this. 



III. Relation of parts to one another accom- 

 panics us throughout the whole animal economy. 

 Can any relation be more simple, yet more con- 

 vincing than this, that the eyes are so placed as 

 to look in the direction in which the legs move 

 and the hands work? It might have happened 

 very differently if it had been left to chance. 

 There were at least three quarters of the com- 

 pass out of four to have erred in. Any consider- 

 able alteration in the position of the eye or the 

 figure of the joints would have disturbed the line, 

 and destroyed the alliance between the sense and 

 the limbs. 



IV. But relations, perhaps, is never so striking 

 as when it subsists, not between different parts of 

 the same thing, but between different things. The 

 relation between a lock and a key is more obvious 

 than it is between different parts of the lock. A bow 



