A Table. 



8. An experiment if fome who 

 pretend) that light may be pre- 

 cipitated into powder. 



p. The Authors optnton concern- 

 ing lamps, pretended to have 

 teen found in tombcs,with /- 

 cottfum^tible lights. 



CHAP. VIII. 



An anfwer to three other obje&i- 

 ons formerly proposed, againft 

 light being a fubftance. 



\. Light is net really in evcrypart 

 of the room it enlightneth,nbr 

 fillet h entirely any fefiblepart of 

 it, though it feem to utto do fo. 



2. The leaft fenfible point of * di- 

 tphanotu body, hath room Ef- 

 ficient to contain both aire and 

 light, together with A multitude 

 of beams tffuing from fever all 

 lights without penetrating one 

 another. 



3. That light doth not enlighten 

 any room in an in ft ant, and that 

 the great celerity of its motion 

 doth make it inpercepttble to 

 our fenfes. 



4. The reafon why the motion of 

 light, is not difcerned coming 

 towards us, and that there is 

 fome reall tardity in it. 



j. The planets are not certainly 

 ever in that place where they 

 appear to be. 



6. 7 he reafon why light being a 

 body, doth not by tts motion 



fratter other bodies into pieces. 



7. The reafon why the body of 

 light if never perceived to be 

 fanned by the wind. 



8. The reafons for, and againft 

 lights being a body, compared 

 together. 



9. t/f fummary repetition of the 

 reafons which prove that light 

 it fire. 



CHAP. IX. 



Oflocall motion in common. 



1 . "\f locall motion cat* be per- 

 formed without frtccejfton. 



2. Time is the common meafure 

 f all fuccejjlon. 



J. What velocity is, and, that it 

 cannot be infinite. 



4. No force fo little , that if 

 not able to move the greateft 

 weight imaginable. 



J. The chief principle of Mecha- 

 nick^dedxce&tftt of the former 

 difcourfe. 



6- T^o mveable can pafle from 

 rtft te* any determinate degre* 

 of velocity, or from a lejfer de- 

 gree to a greater, without paf- 

 fing through all the intermedi- 

 ate degrees which are below the 

 obtained degree. 



7. The conditions which help tt 

 motto*, in the moveable are 

 three; in the medium* one. 



8. 2\^ body hath any intrinfecall 

 virtue to move it felf towards 

 any determinate part of the u- 

 niverfe. 9. The 



