INDEX. 



AIR, the theory of Anaximenes, that it 

 is the sole element discussed, 53. 



Alchymists have by their researches 

 brought much profit to mankind, 29. 



Alphabet of Nature, rule and form of, 

 209. 



Ambitions of men, three kinds of, 35. 



Ambulacra privata, 355. 



Anaxagoras, 26. 



Anaximenes, his theory that air is the 

 one sole element discussed, 53. 



Anaximenes, see Empedocles. 



Ancient philosophers, their theories 

 concerning primitive matter, 49. 



Antarctic hemisphere, dusky spots in, 

 what are causes of, 183. 



Antiquity, knowledge not to be sought 

 in the obscurity of, but in the light 

 of nature, 99. 



Antiquity, philosophers , some of their 

 opinions not false or vain, 101. 



Aristotle, remarks on his system of 

 Natural Philosophy, 26. 



Aristotle subjected his contemplations 

 to terms, 50. 



Aristotle, his custom to prefer the 

 obscure, 173 ; his annihilation of 

 all affinity between the heavenly 

 bodies and all elementary substances 

 a piece of gn-at temerity, 173. 



Aristotle as a moral philosopher sur 

 passed by Tacitus, 102. 



Art, the true extent of, and its power 

 over nature, 154. 



Astronomers, it is of no use to refute 

 their hypotheses, 12. 



Astronomical observations, admonition 

 respecting, 13. 



Astronomy, conceits of philosophers 

 which have disturbed, 10. 



Astronomy ought to be carefully dis 

 tinguished between it and philoso 

 phy, 172. 



Audibles and Visibles, and other so 

 called spiritual species, consents of, 



240, 243; dissents of, 231, 235, 



241, 242, 244. 



BACON, Lord, his reasons for devoting 



himself to philosophy, 103. 

 Bacon, Lord, reasons which induced 



him to devote himself to philosophy, 



220, 223. 

 Bodies, distinction of, according to the 



quantity of matter they contain in 



a given space, 126. 

 Body, of, affected by body, 185. 

 Bodies, propension of, to conglomerate 



with the earth, 185 ; their influence 



terminates in its own sphere, 185. 



CAUSE and Effect, things which agree 

 i.i their periods or in their mode of 

 relation, are always subjected one 

 to the other, or stand on cause and 

 effect, 197. 



Chance, its power in promoting dis 

 covery and invention, 37. 



Choleram refert, 333. 



Circular motion, eternity cannot be 

 predicated from, 174. 



Circular motion no proof ofeternity, 178. 



Classes, things cannot be properly 

 arranged into, by one who does not 

 very well understand the motion of 

 them, 209. 



Combinaiiun and succession of sci 

 entific efforts, on the, 119. 



Communication and transmission of 

 discoveiies and inventions, 42. 



Compass, the effects produced by the 

 invention of, 35 ; Discovery, see In 

 vention. 



Conceits of philosophers, which have 

 corrupted the science of Astronomy, 

 10. 



Copernicus, difficulty of his s\ stem of 

 the earth, 165 ; opinion that it must 

 have echoed from the ancients, 165 ; 

 the sun, opinion that it is centre, 

 quite new ; system, depth of, the 

 third question, 165. 



Cupid and Love, the fables of the an 

 cients respecting, 44. 



