190 NATURAL THEOLOGY. 



where some will affirm the galvanic influence is in 

 operation with something finer than the apparatus 

 of plates and troughs^ 



But were we to institute a comparison between 

 the mechanical contrivances of man and these 

 finer mechanisms in the animal frame, we must 

 recollect that there are structures in the body 

 much more admirable, as we shall have abundant 

 opportunities of showing as we proceed in the 

 present volume. The organs of the senses, which 

 are so many inlets for the qualities of surrounding 

 matter to excite corresponding sensations and 

 perceptions, will afford us delightful subjects of 

 contemplation ; and proofs more conclusive of 

 design in the human body — not only in regard to 

 the system of that body itself, but as it forms a 

 part of the system of the universe. 



