rdulid their own axis' and round the soli. Biit to wavf* 

 that gmss "absurdity of supposing every point of space 

 to be continually -tilled with light, and every point of it 

 to be filled with spirit at one and the' same tims, (which 

 is rlatly impossible, since both are material, and two 

 particles of nr<tfter cannot co-exist in the same space :); 

 how does this remove the difficulty at nil ] How does 

 it help us forward a hair's bread} h ? For \vhut impels 

 li<jlit outward, or -spirit inward '? It can \js no mecha- 

 nical power : it must then be the linger of God ; and 

 if so, what have \\r gained- 1 May vve not as well say 

 at once (as go thus round about); " Gravitation can be 

 no otherwise accounted for tiuui by allowing the direct, 

 immediate power of God, operating through the whole 

 universe!" 



But beside the attraction of gravity there is another 

 species of attraction, between the minute particles 

 whereof bodies are composed. These attract each 

 other at or near the point of contact, with a force much 

 superior to that of -gravity.- It is by this attraction of 

 cohesion that the atoms, or insensible particles of bodies 

 are united- into .sensible masses. Hereby numberless 

 phenomena may be accounted for, which are otherwise 

 inexplicable : such as coa^uiatioa, crystallization, and 

 and the ascent of fluids in capillary tubes. Such like- 

 wise are fer mentation, animal secretion, and many 

 others. Thus nature will be found very simple and 

 conformable to herself, performing all the great motions 

 oi the heavenly bodies, by the attraction of gravity be- 

 tween those bodies, and almost all the motions of their 

 several parts, by this attraction diffused through every 

 particle. Sir Isaac thinks, that without these two prin- 

 ciples there would be no motion in the world : and 

 without the continual operation of them it could not 

 long continue, considering the vast 'and constant dimi 

 jiittiou of motion by various other causes. 



Mr. Hervey's observations on this head are strong 

 ad beautiful* 



C 3 



