Chap.XV. ANTIENT METAPHYSICS. 191 



of matter^ fo put together^ as to coj7miunicate and convey the motion 

 from the moving povuer to the body that is moved ; fo that the 

 machine, properly lb called, is what is intermediate betwixt the mo- 

 ving power and the body to be moved, and is as different from the 

 one as it is from the other. This diftindion is evident in machines 

 of" human conftrudion ; for the loweft mechanic, and even the com- 

 mon obferver, readily diftinguifhes betwixt the machinery and the 

 moving power, whether that be air^ nvater^ vapour^ or what we call 

 gravitation. Thus, in a clock, nobody confounds the wheels and 

 pullies with the weight or poife which makes them move. But the 

 philofopher goes farther, and inquires what is the power that moves 

 the poife ? And, it we make the diftindion, in machines of our own 

 invention, why not in thofe machines made by God Almighty, fuch 

 as an animal body ? 



For, that there is a great deal of machinery in an animal body, it is 

 impoflible to deny. Anatomy very clearly (hows us, that its move- 

 ments are performed by the means of mufcles, finews, and bones • 

 and, befides thefe folid parts, there are no doubt many fubtilc fluids of 

 different kinds, by which a great part of the aniuial oeconomy is car- 

 ried on, but the operations of which are not fo cafily perceived. But all 

 this mechanifm is diftind from the moving power . For, let the ma- 

 chine be ever fo various and complicated ; let the animal fpirits, or 

 fuccus nerveus^ as it is called, be taken into the play, in order to give 

 as much aid as poflible to our materialills ; let the motion be continu- 

 ed and propagated through ever fo many different bodies ; flill there 

 muft be fome power which begins the motion ; and that power, I fay, is 

 an immaterial principle, which I call 7nind \ and which always moves 

 bodies, though it may not ad immediately and diredly upon them, 

 but by the intervention of organs and inflruments, to us often imper- 

 ceptible. 



Further, 



