3i6 ANTIENT METAPHYSICS. Book V. 



BOOK V. 



Of the Principles of Sir Isaac Newton's Astronomy. 



CHAP. I. 



Of Aftronomy, and the difference betivixt it and Phil ofophy.— Sir 

 Ifaac Newton's Principia a Work o/* Aftronomy, not Philofophy. — 

 Sir Ifaac, hoivevery has philofophifed concerning /^f beginning and 

 continuation o/" Motion. — If he is in an error in this Philofophy ^ 

 it belongs to this Work to take notice of it. — Short Account of Sir 

 Ifaac's Syftem. — The Motion of the Planets co?npofed of 'Pro]Q(Xion 

 cwi Gravitation — both thefe Poivers ailing in Right Lines. — Their 

 Elliptical Motion, therefore, to be analyfed into a Polygon of an infi- 

 nite Number of Sides.— -Sir Ifaac thought that both the Motions 

 ivere produced by Bodily Impulfe. — Reafons for afferting this to be 

 his Opinion. — Sir Ifaac, ivhen he ivrote his Principia, did not think 

 (?/"Mind as a Moving Power; — tivo Reafons for that. — Therefore 

 made a Machine of the Heavens. — Has laid it doivn that Body is 

 indifferent to a State of Motion or Reft. — This fubverfive of the 

 antient Philofophy of the difin5iion betivixt Mind ^«J Body.— 

 Dangerous alfo to the Syjlem of Theiim, by denying the Providence 

 of God over the Works of Nature. — 77?^ Mechanical Syftem cannot 

 be confined to the Heavens, but muf defend to the Earth — muf go 

 even the length of Dr Prieftley's Philofoph) — But Sir Ifaac's Ma- 

 chine 



