KNDEX. 



455 



Melloni. M.. his experiments on the 

 transmission of caloric, 208 et seq. 



On the point of maximum heat on 

 the solar spectrum, 215. 



Mercurv, the planet, rotation of, 60. 



-, cl'imate of, 240. 



Meridian, 46. 



, mensuration of, 46. Note 124. 



, form of, 47. 



, quadrant of, 83. 



Messier, M., on Lexers comet, 340. 

 Was the first who observed 

 Encke's comet, 345. 



Metals, dilatation of, 223. 



Meteorites, 381. 



Meteors and shooting stars, 382. 



Metre, a French measure, 84. 



Mica, its action on light, 180, 181. 



Milky Way, 54, 374. 



Mines, temperature of, 242. 



Minor axis of an ellipse, 5. Note 24. 



Mirage, 151, 152. 



Miraldf, M., discovers the rotation of 

 Jupiter's fourth satellite, 65. 



Mifcscherlich, Professor, on crystali- 

 zation, and the effect of heat on 

 crystaline bodies, 105, 106. His 

 theory of isomorphism, 107. On the 

 expansion of crystaline bodies, 2--*- 



Molecular attraction, 9fi. 



Molecule?, or ultimate particles, 101. 



Moll, Professor, his temporary mag- 

 nets, 317. 



Momentum of the planets, 12. Note 

 59. 



Monocotyledonous plants, 267. 



Monsoons, 118. 



Moon, theory of the, 33. 



, periodic and secular perturba- j 



tion of, 34 et gtq. 



, action of planets on, 35. 



disturbs her o.vvn motion, 35. 



, acceleration of, 3ii. 



, periods of her secular inequal- 1 



ities. 37. 



, mean anomaly of,37. Note 106. > 



, form of, 64. 



, mass of, 55. 



, rotation of, 63. 



, libration of, 64, 65. 



, constitution of, 65. 



, light of, 239. 



, atmosphere of, -23,-\ 



, phases of, 38. 



, eclipses of, 39. 



, orbit of, 33. 



, nutation of, 38. 



and earth's reciprocal altrac 



tion. 5. 



Moon's southing. 91. Note 155. 



Moorcroft, Mr., his botanical obser- 

 vations, 265. 



Moser's discoveries, 233. 



Mossotti, Professor, his theory, 97 

 et seq. 



Motion, mean, 9. Notes 43, 45. 



, true, 9. Note 44. 



of solar system, 6. 



of translation and rotation, 6, 7. 



of solar perigee, 81. 



of lunar perigee and nodes, 37. 



of ether, 350. 



Mundy, Captain, his observations 

 on mirage, 152. 



Musical sounds, 125. 



instruments, 137 et seq. 



strines, vibrations of, 134 et seq. 



Note 176. 



Nature, laws of, 386. 



Nebula:, 376. 



, forms of, 377, 378, 



, stellar and planetary, 379. 



, constitution of, 380. 



, distribution of, 380. 



Nebulosity of comets, 352, 357. 



Nebulous stars, 379. 



Needle, the magnetic, 300. 



, the dipping, 301. 



Newton, Sir Isaac, on the attraction 

 of spheroids, 4. His discovery of 

 gravitation, ib. Of the laws of 

 elliptical motion, 4, 22. On the 

 figure of a fluid mass in rotation, 

 4\\. His theory of the tides, 8C. 

 His analysis of lisht, 153, ]54. His 

 theory of light, 161. His rings, 



165. * Mensuration of his rings, 



166. His scale of colors, 167. 

 Nickel, sulphate of, its properties, 



106. Note 161. 



XK! il points of vibrating strings and 

 columns of air, 134 et seq. 



lines in air, 144. 



lines on cylinders, 141. 



lines on surfaces, 138. 



Nodes, ascending and descending, 

 10. Note 55. 



, motion of, 18. Note 73. 



connected with the inclination, 



19. 



Norman, Robert, discovers the mag- 

 netic dip, 305. 



Nutation of earth's axis, 76. Note 

 144. 



of lunar oibit, 7, Note 35, 



