INDEX. 



447 



Capillary attraction of plates, 111 et 



seq. Notes 171, 172. 

 Center of gravity, 4. Note 10. 

 of the solar system, its motion, 



7,23. Note 82. 



of the universe, 23. 



Centrifugal force, 5, 94. Notes 18, 



Chaldeans, their observations of 

 eclipses, 35, 37. 



Chemical rays of the solar spec- 

 trum, 207. 



, transmission of, 207. 



Chemical affinity, 103. 



Chinese science, 83, 85. 



Chladni, his experiments on vibra- 

 ting plates, 140. Note 179. 



Christian era, 80. 



Chromatype, 196. 



Clairaut, his computation of the dis- 

 turbances of Halley's comet, 342. 



Cleavage, 107. 



Climate, 253. 



, stability of, 262. 



of the planets, 238. 



Climates, excessive, 261. 



Coal measures, their early forma- 

 tion, 70. 



Cobalt, a metal, its polarity, 305. 



Cohesion, 96 et seq. 



Cohesive force, the intensity of, 104. 



Cold at Melville Island, 241. 



Colladon, M., his experiments on 

 sound under water, 129. 



Collision of a comet, 72, 347. 



Colored media, their action on light, 

 ]55, 169. 



fringes, 162, 168 et geq. 



Colors, prismatic, 154 et seq. 



, accidental, 159. 



, complementary, 160. 



of the stars, 374. 



Columbus discovers the variation of 

 the compass, 305. His account of 

 the Gulf-weed, 267. 



Coma Berenices, the constellation, 

 nebula* in it, 374. 



Comet, Halley's, 341. 



, Lexel's, 340. 



, Encke's, 345. 



, acceleration of a, 345. 



, Biela or Gambart's, 347. 



, shock of a, 348. 



of the year 1680, 348. 



Comets, 337. 



, orbits of, 339, 350. 



, fall of, to the sun, 350 



, masses of, 352. 



, tails of, 354. 



Comets, nebulosity of, 352, 356. 



, light of, aV7. 



, number of, 360. 



Compass. See Mariner's 

 Compress-ion, 4. Note 11. 



of a spheroid, 6. 



of the terrestrial spheroid, 38, 



48,49. Note 31. 



of Jupiter, 7, 61. 



of a fluid mass in rotation, 38. 



Concentric hollow sphere, its attrac 



tion, 4. Note 8. 



elliptical strata, 44. Note 120. 



Cone, 5. Note 22. 



Configuration or relative position of 



Jupiter and Saturn, 24. Note 85. 

 , of Jupiter's satellites, 27. Note 



88. 



of land and water, 258. 



Conic sections, 5. Note 22. 



Conjunction, 24. Note 83. 



, contemporaneous, of planets, 



41. 

 Connection between the variations 



of the eccentricity and apsides, 



Connection between the variations 



of the nodes and inclination, 19. 



Note 75. 



Convexity of the earth, 50. 

 Coordinates of a planet, 10. Note 



56. 

 Cosine and sine of an arc, 20. Note 



76. 



of latitude, 45. Note 123. 



Cook, Capt., the object of his first 



voyage, 52. 

 Cordier, M., on the heat of the earth, 



242. 

 Coulomb, his balance of torsion, 



27*. 

 Gumming, Professor, his experi 



merits on thermo-electricity and 



magnetic currents, 328. 

 Cryptogamia, 267. Note 214. 

 Crystalization, 105. 



, the water of, 106. 



, effects of heat on, 106. 



Cube, 107. Note 163. 



Cubes of mean distances, 5. Noly 



26. 



Currents in the ocean, 94. 

 of electricity, 287 et aeq., 314 



et aeq. 

 Curves of the second order, or conic 



sections, 5. Note 22. 

 of double curvature are lines 



curved in two directions, like a 



cork-screw or helix, 183. 



