INDEX. 



487 



Miller (Prof.) on the effect of light on 

 the spectrum passed through coloured 

 gases, 381. 

 Minium, experiments on, 402. 

 Murchison (It. I.), his address at the 

 anniversary meeting of the Geological 

 Society, on retiring from the Presi- 

 dent's chair, 467. 

 Murphy ( Mr.) on the roots of equations, 

 60, 220; on the real functions of 

 imaginary quantities, 287 ; on elec- 

 trical influence, 350. 

 Musci, new genus of, 30. 

 Newton, on the phenomena of the rings 



of, 20. 

 Nixon (J.) on the horizonZsector, 327. 

 Notation, on chemical, 309. 

 Oolitic formations of Gloucestershire, 



survey of, 300. 

 Opium, substances contained in, 153. 

 Oxy-hydrogen jet, on a new, 57. 

 Paraffine, analysis of, 78. 

 Pendulum, experiments on the seconds, 

 244, 844, 434 ; on experiments with 

 the, 458. 

 Penryn,on the granite found near, 321, 



322. 

 Petersburg, meteorological observa- 

 tions made at St., 260. 

 Phillips (J.) on a modification of the 



electrophorus, 363. 

 Phillips ( Mr. R. ) x experiments on pla- 

 tina, 94; on the analysis of some 

 combinations of platina, 1 97. 

 Phosphorus, red oxide of, 78 ; hydrate 



of, 79. 

 Plants, fossil, 475. 

 Platina, experiments on, 94 ; analysis 



of some combinations of, 197. 

 Platypus, on the habits of the, 71. 

 Potter (Mr. R. jun.) on a particular 

 modification of the interference of 

 homogeneous light, 83 ; Prof. Airy's 

 remarks on, 161 ; reply to Prof. Airy, 

 276 ; Prof. Hamilton in reply to 

 Mr. Potter, 371 ; on a new heliostat, 

 6 ; on two arches of aurora; boreales, 

 233. 

 Powell (Rev. B.) on the inflexion of 



light, 424. 

 Prideaux (J.) on voltaic action, 210, 



251. 

 Priestley ( Dr. ) commemoration of the 

 centenary of the birth-day of, 158, 

 317 ; Report of the centenary com- 

 memoration of the birth-day of, 383. 

 Prism, on the passage of light through 



a, 284. 

 Pritchard (A.), account of test-objects 



for microscopes, 335. 

 Respiration, on the mechanism of, 354. 

 Retina, action of light on the, 162. 



Reviews : — Journal of the Asiatic So- 

 ciety of Calcutta, 37 1 ; Report of the 

 First and Second Meetings of the 

 British Association, &c, 455. 



Rigaud (Prof.) on a curious deposition 

 of ice on a stone wall, 190. 



Robison (Mr.) on the improvement of 

 light-houses, 221. 



Royal Astronomical Society, 475. 



Royal Institution, proceedings of, 309. 



Royal Society, anniversary meeting of, 

 374; proceedings of, 131,291,373, 

 464; Address of President, 131. 



Rudberg (Prof.) on the magnetic in- 

 tensity at Paris, Ac. &c, 4. 



Rust, effect of, in improving the quality 

 of steel, 75, 406. 



Santini (Prof.), observations on Biela's 

 comet, 378. 



Scrymgeour (James), experiments on 

 the seconds pendulum, 244, 344, 434. 



Sedgwick (Rev. A.) on the fossil shells 

 of the Isle of Sheppey, 149; on the 

 geology of North Wales, 381. 



Sloth, on the structure of the, 308. 



Smith, on certain phenomena of light 

 described by, 168. 



Societies, learned : — Royal Society,131, 

 291, 373, 464; Linnasan Society, 67, 

 222, 307, 377; Geological Society, 

 147, 300, 466 ; Royal Astronomical 

 Society, 222, 378, 475 ; Zoological 

 Society, 68, 230 ; Royal Institution, 

 309; Cambridge Philosophical So- 

 ciety, 314, 380. 



St. Bernard, relative positions of the 

 convent, and Chamouni, 61. 



Steam-engines, work of the five best in 

 Cornwall, 318. 



Steel, improvement of, from rust and 

 being buried in the earth, 75, 406. 



Sturgeon (Mr.) on magnetic electricity, 

 32 ; on the theory of magnetic elec- 

 tricity, 201, 366. 



Submarine forest, on the existence of, 

 in Cardigan Bay, 148, 241. 



Sulphurous acid, action of, on the per- 

 salts of iron, 75. 



Sykes (Col.), catalogue of birds from 

 Dukhun, 230; on the geology of 

 Dukhun, 304. 



Switzerland, on an optical phenomenon 

 seen in, 452. 



Talbot (Mr.) on chemical changes of 

 colour, 359 ; on an optical pheno- 

 menon seen in Switzerland, 452. 



Telescope, account of Dollond's fluid- 

 refracting, 373. 

 Tellurium, analysis of the sulpho- 



plumbiferous, 404. 

 Tilgate Forest, on the fossil reptiles of, 

 150. 



