INDEX: 



I. 37 



Platina, spontaneous combustion of, 

 104. 



Poinsot, M., on the invariable plane, 

 23. 



Poisson, Baron, his researches on 

 capillary attraction, 109. On the 

 distribution of the electric fluid, 

 276. On the law of the magnetic 

 force, 308, 309. 



Polar star, 77. 



Polarization of light, 172 



by refraction, 173. 



by reflection, 178. Xote 205. 



, circular, 183 et seq. Note 209. 



R. 



Radial force, 7. 

 Radiation, 221 et seq. 



of the earth. -251. 



of the sea, 256. 



, solar, 68, 261. Note 140. 



Radii vectores, 8. Note 40. 

 Radius, 4. Note 15. 

 , terrestrial, polar, and equato- 

 rial, 47. 



, solar, 56. 



vector, 14. 



Raffles, Sir Stamford, his account 



of the volcanic irruption at riaou- 



ba\va, 247. 

 Rain, 2-22. 



Ratio, 4, 5. Note 16. 

 Rays of Light, 148. 



in quartz, 183, 187. 



, interference of, 168. Note 211. 



Polarizing angles, 179. Note 205. 



apparatus. Note 206. 



Poles of rotation, 4. Note 11. 



elliptical, 187. 



, discovery of, 189. 



of heat, 2"l5. 



, circular, of heat, 217. 



Polarized light, 173. 



, undulations of, 176, 188. Note of heat, 208 



201. i , chemical, 193 et seq. 



, phenomena of, 180 et seq. , extraordinary and ordinary, 



Notes -207, 208. ! 177. 



i Reflection of light. Notes 184, 198. 

 , extraordinary and total. Note 

 i 184. 



of sound, 131. Notes 174, 



175. 



of celestial equator, orequinoc- of waves, 131. Note 174. 



rial, and of ecliptic, 9, 76. Note Refraction of light, 148, 149, 171. 

 46. i Notes 184, 198. 



of maximum cold, 260. , atmospheric, 148. Note 185. 



, magnetic. 300. i in eclipses, 39. 



Pouillet, M., his estimation of the i , terrestrial, 150. Note 187. 



quantity of heat annually received . extraordinary, 150. Notes 188, 



from the sun, 251, 252! On the i 189. 

 production of atmospheric elec- ' Repulsive force, 96. 

 tricity, 281. Resisting medium, and its effects, 



Powell, Professor, on the dispersion 21, 162, 163, 346. Note 78. 

 of light, 191. His experiments on i Resonance, 144. 

 heat, 213. i Retrograde motion, 13. Note 61. 



Precession and nutation, 74. Notes Revolution, sidereal, of planets, 16. 

 143,144. Notefi. 



, effects of, 75, 77. , tropical, 16. Note 69. 



Principal axis of rotation, 71. , synodic, 39. Note 112. 



Prism, its use. 153. 154. and rotation of the celestial 



Prismatic colors. 154. bodies in the same direction, 61. 



Probabilities, theory of, its utility, 59. Rhombohedron, 175. Note 200. 

 Problem of the three bodies, 11. Richman, Professor, killed by light- 

 nine, 383. 



Richter, his observations on the pen- 

 dulum at Cayenne, 51. 

 Rings, Saturn's, 62. 



Quadrant of the meridian, 84. Note , colored, round, small aper- 



151. tures, 168. 



Quadratures, 9. Note 51. . Newton's, 165. Note 194. 



Quadrupeds, their distribution, 270. \ Ritchie, Professor, causes water to 

 Quart/, or rock crystal, its proper -I rotate, 316. On the composition 

 ties, 177, 183, 187. I of water by magnetic action. 335. 



Projected, 5. Note 20. 

 Q. 



