Chap. III. ANTIENT METAPHYSICS. 347 



CHAP. III. 



The Jtmple State of the ^lejlion. — The Jl range Confequences of this 

 Axiom. — It cannot be proved by Experiment — muji necejfarily be 

 proved y a priori, by Metaphyfical Reafoning. — The falfehood of it 

 proved from three Principles, that cannot be controverted. — Motion 

 not one, but many, as many as there are Changes of Place. — // /'/ 

 only continuity that makes one o/'many Motions. — (9/" Communi- 

 cation o/"Motion. — The Neivtonians have erred in this matter from 

 not confidering tivo things, viz, /^^ Nature o/" Motion, and the Doc- 

 trine 0/" Firft rt«(i Second Caufes, — The Neivtonians ought not to 

 be angry that the Metaphyfical Principle, upon ivhich Sir Ifaac 

 has built his Aflronomy, has been fo freely examined. — Authorities in 

 fupport of the Author s Opinion. — Jntient Authorities. — Authority 

 of Ariftotle. — Modern Authorities. — Leibnitz. — Dr Clarke. — Dr 

 Horfley. — Sir Ifaac himfelf — True Account of the Continuation of 

 the Motion of a Body impelled is by Mind. — This according to the 

 Analogy 0/" Nature, as Nature is defined by Ariftotle. — Other Mo- 

 tions oj the fame kind in Nature, fuch as the Motions of Animals 

 Vegetables, and the Loadftone and Iron. — The Impulfe not the 

 Caufe properly of the Motion, but the OccaCion. — Of the Duration 

 of the Motion by Impulfe. — It decays by degrees. — This likexvife a- 

 greeable to the Analogy of Nature. 



HAVING thus cleared the ground, by removing every thing 

 that is foreign to the queftion at ifl'ue, I will now proceed to 

 examine it more clofely. It is, as I have explained it, fimply this. 

 Whether a Body impelled by another Body, fo as to go on without 



X X 2 the 



