CONTENTS. 



Term of Vis Infita unnccclTary and improper ;— not to be underftood of Miml—T\\K 

 Firjl Laiv o( Motion not a general Propofition, bccaufe not app'icablc to Motion begun 

 by -WW— only to Motion begun by £w/j— nor to all Motion of that Kind— only to 

 Piilfion~'D\ii\nQ\on betwixt Pulfion and Trufioti—T vro Kinds of Trufion alfo to be 

 diflinguiflied- Similarity hG\.w\xi Ahtion by Mind, and Motion by 7j«//w- Objec- 

 tion, that there can be no Motion by Trufion in Vacuo, anfwered. Page 333 



CHAP. III. 



The fimple State of the Queftion— The ftrange Confequences of this Axiom— It cannot 

 be proved by Experiment — muft necefTarily be proved, a priori, by Metaphyftcal Rta- 

 foning — The Falfehood of it proved from three Principles, that cannot be contto- 

 verled — Motion not one, but >?i(iny, as many as there are Changes of Place— It is only 

 Continuity that makes one of many Motions — Of Communication of Motion — The.New- 

 tonians have erred in this Matter from not confidering two Things, viz. the Nature 

 of Motion, and the Doctrine oi Firjl and Second Caufes — The Newtonians ought not 

 to be angry that the Metaphyfical Principle, upon which Sir Ifaac has built his Aflro- 

 jiomy, has been fo freely examined — Authorities in Support of the Author's Opinion 

 — Antient Authorities — Authority of /iriJ?otle—Moiieri\ Authorities — Leibnitz — 

 Dr. Clarke— T)r. HcrJIey— Sir Ifaac himfelf — True Account of the Continuation 

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

 Nature, as Nature is defined by Arifotle ~ Other Motions o{ iht fame Kind in Nature, 

 fuch as the Motions of Jnimals, Vegetables, and the Loadjhne and Iron — The Impulfe 

 iiot the Caufe properly of the Alotion, but the Occafan — Of the Duration of the 

 Motion by Impulfe — It decays by Degrees — This likewife agreeable to the Analogy 

 of Nature. p. 347 



CHAP. IV. 



An Inquiry concerning the Principle oi Alotion oi the Celeflial Bodies, not concerning the 

 Laws of their Motions — The Q^ieftion ftatcd concerning the Eternity of the JVorld — 

 We can only judge of the Motions in the Ueavj^ns by thofe on Earth — Thofe can 

 only be produced in one or other of three Ways — The frjl is by the Body moving itfef 

 — This Hypothcfis examined — fliown that it confounds all Diflinfiion between Alind 

 and Body, and has a Tendency to downright Atheifm—id Hypothefis, That Bodies 

 here are moved by other Bodies — This Movement either by Trufion or Impulfe — Gra- 

 vitation net to be accounted for in either of thefe Ways — Of /ttraSlion, and the 

 Abufe of that Word — Of the Motion of the Tides — not to be accounted for by Pro- 

 je£}ion i>r\ii Gravitation, nor otherwife, except hy Alind— Oi the third Motive Power 



on 



