470 



INDEX. 



Combustion of charcoal, spontaneous, 

 89. 



Comets, catalogue of, 101, 198. 



Conical refraction, 114, 197. 



Conybeare (Rev. W. D.) on an alleged 

 discovery of coal in Leicestershire, 

 112; early anticipation of phreno- 

 logy, 308. 



Crystalline lens, on the, 5, 446. 



Crystalline solid, formed during the 

 manufacture of sulphuric acid, 115. 



Cynictis, a new genus of Carnivora, 67. 



Dan i (Dr.) on the manufacture of sul- 

 phuric acid, 1 15. 



Daturia, 464. 



Davies (J.) on the cause of the spon- 

 taneous combustion of charcoal, 89. 



Davies (T. S.) on Bernoulli's solution 

 of the problem of shortest twilight, 

 179, 277 ; researches in spherical 

 geometry, 366 ; on the employment 

 of coordinates, &c. in the determina- 

 tion of spherical loci, 379. 



Davy (Dr.) on the recent volcano in 

 the Mediterranean, 148, note on, 

 447 ; on the combinations of car- 

 bonic acid and ammonia, 457. 



Diamond, structure and origin of, 219. 



Edmonds (R.) on the visibility of stars 

 by day, 238. 



Elastic fluids: — evolved from volcanos, 

 159; vibratory motion of in tubes 

 of definite length, 235. 



Elasticity of gold, modulus of, 20. 



Electricity : — experimental researches 

 in, 38, 161, 253, 353, 449, 460; the 

 velocity of, 81 ; theory of thermo- 

 electricity, 205, 262. 



Electro-magnet: — its power to retain 

 its magnetism, 122; curious proper- 

 ties of, 1 24. 



Electro-magnetism : — of metalliferous 

 veins, 16, 17 ; on certain experiments 

 in, 18; experimental researches in, 

 145. 



Equations, on the roots of, 417. 



Eye, new membrane of, 87 ; on certain 

 changes of colour in the choroid coat 

 of, 289. 



Fairholme (G. ) on the nature of coal, 

 and on the mode of deposition of the 

 coal strata, 245. 



Faraday (Dr.) experimental researches 

 in electricity, 3S, 161, 253, 353, 449, 

 460; on holding the breath for a 

 lengthened period, 241. 



Fielding (G. H.) on a new membrane 

 of the eye, 87. 



Figures of vibrating surfaces, 144. 



Fluids, elastic : — evolved from vol- 

 canos, 159; vibratory motion of in 

 tubes of definite length, 235. 



Forbes (J. D.) on the progress of me- 

 teorology, 131; on certain vibrations 

 in metallic masses having different 

 temperatures, 303. 



Formic acid, preparation of, 313. 



Formic and acetic acid, difference be- 

 tween, 73. 



Fossil fruits, 76 ; fossil-bone caverns, 

 237. 



Furs, method of dressing, so as to pre- 

 serve their colour, &c„ 297. 



Geoffroy- St.-Hilaire, on the mammary 

 glands of the Ornithorynchus, 60,62. 



Geological Society, 42, 219, 368. 



Geology : — on the chemistry of, 20 j of 

 Northumberland and Durham, 28, 

 92, 200, 273 ; Address of the Presi- 

 dent of the Geological Society, 42 ; 

 discovery of coal-measures and fossil 

 fruits in Leicestershire, 76, 112; of 

 the environs of Bonn, 220; sedimen- 

 tary deposits of Shropshire, Here- 

 fordshire, &c, 224; fossil-bone ca- 

 verns, 237 ; on the nature of coal, and 

 on the mode of deposition of the coal 

 strata, 245; on the Squalo-raia Doli- 

 chngnathus, 369; organic remains, 

 369, 371; on the osseous cave of 

 Santo Ciro, 371. 



Geometry, spherical researches in, 366. 



Gold, modulus of elasticity of, 20. 



Gopher-wood of the Scriptures, on, 

 103. 



Gould (C.) description of a new object 

 for the microscope, 318. 



Graham (T.) on the arseniates, phos- 

 phates, and modifications of phos- 

 phoric acid, 451, 459. 



Gray (J. E.) on the structure of shells, 

 452. 



Hadfield (W.) on the circumstances 

 producing ignition in charcoal in 

 atmospheric temperatures, 1. 



Heat, influenceof on colour and odours, 

 458. 



Henry (J.) on the roots of equations, 

 in answer to Mr. Murphy, 417. 



Hen wood (W. J.) on the rise and fall 

 of water in certain springs in Corn- 

 wall and Flintshire, 417. 



Herschel (Sir J. F. W.) on the elliptic 

 orbit of* \ Bootis, 291 ; on the absorp- 

 tion of light by coloured media, 401. 



Holdsworth (J.), discovery of coal- 

 measures and of fossil fruits in Lei- 

 cestershire, 76 ; Rev. W. D. Cony- 

 beare's remarks on, 112. 



Horner (L.) on the geology of the en- 

 virons of Bonn, 220. 



Hussey (Rev. T. J.), catalogue of co- 

 mets, 101, 198. 



Hyaena, tameable disposition of, 296. 



