510 



INDEX. 



Comets, number of, 411. 



discovered by M. Brorsen, 398, 399. 



Compass. See Mariner's Compass. 

 Compression, 5. Note 11. 



of a spheroid, 7- 



of the terrestrial spheroid, 44, 54, 



57. Note 31. 



of Jupiter, 8, 75- 



of a fluid mass in rotation, 44. 



Concentric hollow sphere, its attraction, 



5. Note8. 



elliptical strata, 51. Note 120. 



Cone, 6. Note 22. ' 



Configuration or relative position of 



Jupiter and Saturn, 29. Note 85. 



of J upiter's satellites, 32. Note 88. 



of land and water, 295. 



Conic sections, 6. Note 22. 

 Conjunction, 29. Note 83. 



, contemporaneous, of planets, 47. 



Connection between the variations of 



the excentricity and apsides, 20. 

 between the variations of thenodes 



and inclination, 22. Note 75. 

 Convexity of the earth, 57. 

 Co-ordinates of a planet, 12. Note 56. 

 Cosine and sine of an arc, 23. Note 76. 



of latitude, 52. Note 123. 



Cook, Capt., the object of his first 



voyage, 60. 

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



277- 



Coulomb, his balance of torsion, 314. 

 Cumming, Professor, his experiments 



on thermo-electricity and magnetic 



currents, 374. 



Cryptogamia, 305. Note 214. 

 Crystallization, 123. 



, the water of, 124. 



, effects of heat on, 125. 



Cube, 125. Note 163. 



Cubes of mean distances, 6. Note 26. 



Currents in the ocean, 111. 



of electricity, 327 tt seq. , 355 et seq. 



Curves of the second order, or conic 



sections, 6. Note 22. 

 of double curvature are lines 



curved in two directions, like a cork- 

 screw or helix, 213. 

 Cyanotype, 227. 



Cylinder or tube, vibration of, 169. 

 , electro-dynamic, 361. Note 219. 



D. 



Daguerrotype, 226. 



Dalton, Dr., his laws of definite pro- 

 portion, 121. His experiments on 

 evaporation, 262. 



Darnoiseau, M., his computation of the 

 perturbations of Biela's comet, 396. 



Daubuisson, M., on the temperature of 

 mines, 277- 



Davy, Sir Humphry, his opinion of 

 electric light, 318. His decomposition 

 of the earths and alkalies, 337. His 

 experiments on the transmission of 

 the electric fluid, 382. 



Davy, Dr., his experiments on animal 

 electricity, 383. 



Day, the length of, invariable, 86. 



, astronomical and sidereal, 9 . 



Note 145. 



Declination, 99, 105. Note 154. 

 , cosine of, 107. Note 154. 



Declination needle. See Mariner's Com- 

 pass. 



Definite proportion, 120. 



of electricity, 122. 



Degrees, minutes, and seconds of arcs, 

 11. Note 50. 



of the meridian, mensuration of, 



53. 



Delambre, M. , his computations show 

 that the length of the year has not 

 been increased by the action of 

 comets, 386. 



De la Rive, M., determines the tem- 

 perature of an Artesian well, 279. 



De Laroche, M., his experiments on the 

 transmission of caloric, 242. 



Density of bodies, 65. 



of the sun and planets, 65. 



of the ocean, 5^ 56. 



of the" earth, 88. 



Depth of the ocean, 58, 87, 103. 



Deviation of light, 184. Note 191. 



Dew, the formation of, 255. 



Diamagnetic properties of matter, 369. 



substances innumerable, 369. 



, experiments on, 370. 



Diameter, 2. Note 1. 



of the sun and earth, 63. 



of the moon, Jupiter, and Pallas, 



31, 59, 64. 



