INDEX. 



479 



Mont Blanc, on the varying colours of, 



at sunset, 335. 

 Monticelli (Sig.) on the structure of 



lava, 228. 

 Morphia, new process for obtaining, 



327. 

 Murchison (R. I.) on the structure of 

 the Cotteswold and Cleveland hills, 

 22], 

 Narcissinecc, Haworth on the, 275. 

 Necker (Prof.) on some remarkable 

 optical phaenomena seen in Switzer- 

 land, &c., 329 ; on the relative position 

 of metallic deposits and unstratified 

 rocks, 225. 

 Negro's (Sig. Dal.) magneto-electric 



experiments, 45. 

 Negros, Asiatic, naturalhistory of the, 



466. 

 Newcastle (in Australia), geology of, 



the south-east coast of, 92. 

 Newton's rings, on the phaenomena of, 



400. 

 Nicolaieff, on the mean temperature of, 



132. 

 Nixon (J.) on the measurement of the 

 instrumental error of his horizon- 

 sector, 98 ; on a repeating circle, 340. 

 Object-glasses, on a new species of 



coloured fringes in, 19. 

 Occultations, lunar, for July, 87; Au- 

 gust, 167; September, 247 ; October, 

 327 ; November, 405 ; December, 

 473. 

 Optical phaenomena, some remarkable, 



seen in Switzerland, 329. 

 Optics: on the undulations excited in 

 the retina by luminous points and 

 lines, 169; on a new photometer by 

 comparison, 174; on the action 

 of the brain on vision, 249. 

 Ornilhorhyncus paradonis, on the mam- 

 mary glands of the, 384. 

 Oxford, meeting of tlie British Associa- 

 tion at, 77. 

 Papuans, on the natural history of the, 



466. 

 Paraffin and eupion, on, 402. 

 Patents, list of new, 16T; on the law 



of, 212. 

 Pearson's (Dr.) Introduction to Prac- 

 tical Astronomy, 370, 450. 

 Pekin, magnetical and meteorological 



observations at, 130. 

 Pendulum, IMr. Baily on the, 379; in- 

 variable experiments with, 420. 

 Peroxide of iron, separation of from 

 protoxide of manganese, 85; from 

 protoxides of iron, 86 ; from oxides 

 of cobalt and nickel, 86. 

 Phillips (J.) on the lower coal series of 

 Yorkshire, 349. 



Photometry, by comparison, on a new 



instiTiment for, 174. 

 Platinum, muriate of, action of light 

 in determining its precipitation by 

 lime-water, 58. 

 "P. M." on chemical decomposition 

 effected by the magneto-electric cur- 

 rent, 161. 

 Polarity, magnetic in metallic bodies, 



31. 

 Pons (J. L. ), notice of the death of, 



239. 

 Population of Great Britain, compa- 

 rative account of the, 213, 361. 

 Potash, preparation of chlorate of, 164; 



preparation of caustic, 244. 

 Potter (R. jun ) on giving conic sec- 

 tional figures to lenses, &c., 55 ; on 

 the reflection at the second surface 

 of flint glass at incidences of total 

 reflection, 57 ; on a new photometer 

 by comparison, 174. 

 Powell (Rev. B.) on experiments re- 

 lative to the interference of light, 433. 

 Prideaux (J.) on the meteor seen June 



29th, &c. 307. 

 Pulo Pinang, on the geology of, 224. 

 Pyrometer, on a new register-, 197,261. 

 Refraction, of the rays in crystals, on 



the, 1, 136. 

 Respiration and irritability, mutual re- 

 lation of, 73. 

 Retina, on the effect of compression 

 and dilatation on the, 89 ; on the 

 undulations excited in the, by lumi- 

 nous points and lines, 169; experi- 

 ments on the effect of light on, 251. 

 Reviews of books: — Dr. Goring and 

 Mr. Pritchard's "Microscopic Cabi- 

 net," 163; Edmonds's" Life-tables," 

 204; E. Hodgkinson "on Suspen- 

 sion Bridges and Iron Beams," 207 ; 

 Mr. Babbage " on the Economy of 

 Machinery and Manufactures," 208; 

 " Comparative Account, — Popula- 

 tionof Great Britain," 218, 361 ; Dr. 

 Pearson's " Introduction to Practical 

 Astronomy," 370, 450; Todd "on 

 the Anatomy and Physiology of the 

 Organ of Hearing," 375; Bevan's 

 " Guide to the Carpenter's Rule," 

 457. 

 Rocks, unstratified, relative position of 

 metallic deposits with regard to, 225. 

 Rudberg ( Prof ) on refraction of tlie 

 rays of crystals, 1, 136; on the varia- 

 tions produced by temperature in the 

 double refraction of crystals, 410. 

 Safety-tube for combustion of hydro- 

 gen and oxygen, 82. 

 Saturn, occultation of, observed at Ge- 

 neva, 327. 



