168 NATURAL THEOLOGY. 



vided ; two called ventricles : which send out the 

 blood, viz., one into the lungs, in the first instance ; 

 the other into the mass, after it has returned from 

 the lungs ; two others also, called auricles, which 

 receive the blood from the veins, viz., one, as it 

 comes immediately from the body ; the other, as 

 the same blood comes a second time after its cir- 

 culation through the lungs. So that there are two 

 receiving cavities, and two forcing cavities. The 

 structure of the heart has reference to the lungs ; 

 for without the lungs, one of each would have 

 been sufficient. The translation of the blood in 

 the heart itself is after this manner. The receiv- 

 ing cavities respectively communicate with the 

 forcing cavities, and, by their contraction, unload 

 the received blood into them. The forcing cavi- 

 ties, when it is their turn to contract, compel the 

 same blood into the mouths of the arteries. 



The account here given will not convey to a 

 reader ignorant of anatomy any thing like an ac- 

 curate notion of the form, action, or use of the 

 parts, (nor can any short and popular account do 

 this,) but it is abundantly sufficient to testify 

 contrivance ; and although imperfect, being true 

 as far as it goes, may be relied upon for the only 

 purpose for which we offer it — the purpose of 

 this conclusion. 



" The wisdom of the Creator,'' saith Ham- 

 burgher, " is in nothing seen more gloriously than 

 in the heart." And how well doth it execute its 

 office ! An anatomist, who understood the struc- 



