Chap. TI. ANT I EN T METAPHYSICS. :iii 



CHAP. 11. 



Comparifon betrvixt the antient and modern Materialijh. — Sir Ifaac's 

 FirftLaw o/"Motion, the Foundation of all the Mechanical Philofo- 

 phy of modern Times. — Ought therefore to be mofl carefully exami- 

 ned. — That this yJxiom /honld not be knoivn to the Antient s^ extra- 

 ordinary. — To judge of the Truth of it^ belongs to the Firft Philofo- 

 phy. — Of the Nature o/" Motion; — a thing of conjlant Change and 

 SuccefTion. — Reft, the oppoftte 0/ Motion. — Improper, to apply the 

 fame Terms, atid drazv the fame ConcluJionSy concerning Oppofites. — 

 Other Improprieties of Expreffion by zvhich moving and being mo- 

 ved, are confounded, and Vis Inertiae applied to Body in a State 

 ©/"Reft and in Motion. — Of the fe'veralWays in ivhich the Motion 

 can befuppofed to be carried on after the hnpulfe has ceafed. — Thefe 

 are four. — // is generally underflood by the New'tonians to go on by 

 Virtue of one of thefe, viz. Impulfe. — ^fo, Sir Ifaac's Term of 

 Vis Infita, unnecejfary and improper; — not to be underflood of 

 Mind. — The Firft Law of Motion not a general Propofition, be- 

 caufe not applicable to Motion begun by Mind — only to Motion be- 

 gun by Body — nor to all Motion of that kind — only to Pulfion. — 

 Biflinclion betivixt Pulfion and Trufion. — Two kinds of Trufion 

 alfo to be difinguifloed. — Similarity betivixt Motion by Mind, and 

 Motion by Trufion. — ObjecTion, that there can be no Motion by Tru- 

 fion in Vacuo, anfivercd.^ 



IN the preceding Chapter, I think I have fliown, that the Ma- 

 chine which Sir Ifaac has made of the Heavens, fo complicate 

 and intricate, and which is moft extraordinary, and without ex- 

 ample. 



