94 NATURAL THEOLOGY. 



ally. For the purpose which we want, that of 

 evincing intention, we know a great deal. And 

 what we know is this. We see the blood carried 

 by a pipe, conduit, or duct, to the gland. We see 

 an organized apparatus, be its construction or 

 action what it will, which we call that gland. 

 We see the blood, or part of the blood, after it 

 has passed through and undergone the action of 

 the gland, coming from it by an emulgent vein or 

 artery, i, e., by another pipe or conduit. And we 

 see also at the same time a new and specific fluid 

 issuing from the same gland by its excretory duct, 

 i. e., by a third pipe or conduit ; which new fluid 

 is in some cases discharged out of the body, in 

 more cases retained within it, and there executing 

 some important and intelligent office. Now sup- 

 posing, or admitting, that we know nothing of the 

 proper internal constitution of a gland, or of the 

 mode of its acting upon the blood, then our situa- 

 tion is precisely like that of an unmechanical 

 looker on, who stands by a stocking-loom, a corn- 

 mill, a carding-machine, or a thrashing-machine, 

 at work, the fabric and mechanism of which, as 

 well as all that passes within, is hidden from his 

 sight by the outside case ; or, if seen, would be 

 too complicated for his uninformed, uninstructed 

 understanding to comprehend. And what is that 

 situation ? This spectator, ignorant as he is, sees 

 at one end a material enter the machine, as un- 

 ground grain the mill, raw cotton the carding- 

 machine, sheaves of unthrashed corn the thrashing- 



