382 



Cupid, why fabled to be without a 

 parent, 45. 



Cupid, able interpretation of those 

 parts of, which make Cupid a de 

 finite person, 50 ; and veiled, 51. 



DEMOCRITDS, the philosophy of, ex 

 hibited in the fable of Cupid, 44, 

 49. 



Democritus, the repute in which his 

 philosophy is held, 48; circum 

 stances which caused it to sink into 

 neglect, 48 ; primitive remarks on 

 the theory of Democritus and Leu- 

 cippus, 167 ; intermixtum and coa- 

 cervatum theories of, 167 ; whether 

 the interstellar space or pure ether, 

 be one entire unbroken stream, or 

 consist of a variety of contiguous 

 parts, 168. 



Democritus, his theory of the uni 

 verse, 162. 



Dissimulatione et Simulatione, 260. 



EARTH, whether it is perishable, 173 ; 

 the internal parts not more exposed 

 1o decay than the heavens them 

 selves, 174. 



Earth itself furnishes the cause of al 

 most none of its changes, 174. 



Earth, rotation of, an extravagant no 

 tion, 199 ; whether the diurnal mo 

 tion is confined within the region of 

 heaven, 198. 



Earth, the idea that it is a magnet a 

 light imagination, 203 ; inward parts 

 of, cannot resemble any substance 

 which the eye of man hath seen, 203. 



Ecclesiae unitas, qui sunt ejus fructus, 

 254 ; qui limites, 255 ; quibus mo- 

 dis concilietur, 257. 



Echo, phenomenon of, 240. 



Element, the author intends by the 

 word only larger masses of conna 

 tural substances, 157. 



Empedocles, 26. 



Ktnpedocles, his theory of the sub 

 stance of the moon, 183. 



Empirical, when united with philoso 

 phical, means of arts and science, 

 will accelerate their progress, 39. 



Errors of times past in natural philo 

 sophy a source of hope for the fu 

 ture, 40. 



Ether, three regions of region of air, 

 of planetary heaven, of starry hea 

 ven, 169. 



Ether, the outer body of, not certain 

 that it is diaphonous, firm, and im 

 mutable, 175. 



Ether, the opinion that it is the vehicle 

 to which the stars are carried, 182. 



Eternity of the sun, objected to that 

 innumerable changes take place on 

 its surface, and not in heaven an 

 swered, 180. 



FLAME, difference between terrestrial 



and celestial, 147. 

 Flame, expansion of the body of, may 



be estimated by probable conjecture, 



148. 



GENERATIONS, history of, or nature at 

 large, five divisions of, 157. 



Gilbert, his theory of a &quot; vacuum coa- 

 cervatum, 4. 



Gilbertus, his theory that stars are solid 

 bodies in vacuo except surrounded 

 by an atmosphere, 166. 



Gilbertus, his observations that heavy 

 bodies carried a distance from the 

 earth are gradually divested of their 

 motion towards bodies beneath, 185. 



Globe, intellectual description of, 156. 



Globe, is the form into which larger 

 accumulationsof tilings impart them 

 selves, 171. 



God, no sufficient light for the know 

 ledge of, to be expected from the 

 interpretation of natural things, 92. 



Gradations, fine, alternate into dis 

 tinct transits by nature, 169 ; Sun 

 masculae in a germ of starry matter, 

 169 ; Jupiter, satellites of, 169. 



Gravity, specific, see matter; history 

 of the expansion and conjunction of 

 in the same body, 137. 



Greece, philosophers of, their systems 

 of natural philosophy, 25. 



Gunpowder, effects produced by the 

 invention of, 35. 



HEAVENS, surprising changes and ano 

 malies take place therein, apparent 

 from the appearance of new stars, 

 176. 



Heavenly bodies, theory of the matter 

 composing them, 1. 



Heavenly bodies, theory of their mo 

 tions, 13 : opinions affirmed and 

 denied by this theory, 14. 



Heavenly bodies, history of, should 

 only embrace phenomena and not 

 dogmas, 158 ; detailed statement of, 

 160. 



Heavenly bodies, when the substance 

 is different from that of this lower 

 orb, 173. 



Heavenly bodies, change in, 175 ; 



