INDEX. 



549 



Fish, fossil, descriptions of some, 223. 



Fish river of the Polar Sea, observations 

 on the, 412. 



Fitton (Dr.) on the strata below the 

 chalk, 220. 



Fluoride of iodine, preparation of, 520. 



Fluorine, on the occurrence of, in fossil 

 and recent bones, 14, 122, 260. 



Forbes (Prof. E.) on fossil remains of 

 Ophiuridae in Britain, 212. 



Forster (T.), notice of the meteors of the 

 9th and 10th of August 1844, as wit- 

 nessed at Bruges, 339. 



Fossil forests, notices respecting some, 

 215. 



Fremy (M.) on the metallic acids, 482. 



Fresenius (Dr.) on an improved method 

 for tlie detection and quantitative de- 

 termination of arsenic, 255 ; on the in- 

 organic constituents of plants, 500. 



Galena, on some singular crystals of, 232. 



Galvanic current, on the reduction of me- 

 tallic solutions by the, 434. 



Gases, on the diffusion of, 5 1 , 282. 



Gassiot (J. P.) on the repetition of an ex- 

 periment in which electrical tension is 

 produced without metallic contact, 283; 

 on an extensive series of the water bat- 

 ter\', and on the electrical and chemical 

 actions which take place before and 

 after completion of the voltaic circuit, 

 285. 



Geological Societv, proceedings of the, 

 212, 539. 



Giraffe, on some fossil remains of the, 

 212. 



Glass, on the pyro-electricity of, 344 ; on 

 a new method of silvering, 546. 



Glassford (C. F. 0.) on the cyanides of 

 the metals, and their combinations with 

 cyanide of potassium, 56, 66. 



Gold, on the oxides of, 157, 237, 315, 393. 



Gold mines of Brazil, remarks on the, 

 341. 



Graves (Prof.) on imaginary logarithms, 

 401. 



Gualtheria, on the oil of, 480. 



Gulliver (G.) on the blood-corpuscles of 

 Mammalia and Birds, 528 ; on the 

 blood-corpuscles of the two-toothed 

 Sloth, 538. 



Hamilton ( W. J.) on the geology of some 

 parts of Tuscany, 539. 



Hamilton (\V. R.) on a new system of 

 imaginaries in algebra, 10, 241, 489. 



Hare (Prof. H.) on Dove's essay on the 

 law of storms, 94. 



Harkness (R.) on the occuiTcnce of fossils 

 in the boulder clay, 219 ; on the action 

 of the yellow rays of light on vegeta- 

 tion, 339. 



Heat, on specific, 334. 



produced during metallic substitu- 

 tions, on the, 93. 



Henderson (Prof.) on the right ascensions 

 of the principal fixed stars, 306. 



Henry (Prof.) on the mechanical proper- 

 ties of the phosphorogenic rays, 1 13. 



Henslow (Rev. Prof.) on concretions in 

 the red crag at Felixstow, 214. 



Henwood (W. J.) on the Morro Velho 

 mine, province of Minas Geraes, and on 

 the relations between the structure of 

 the containing rocks and the directions 

 of the shoots of gold in the Brazihan 

 mines, 341. 



Herschel (Sir J. F. W.) on the entrance- 

 passages in the pyramids of Gizeh, 133 ; 

 on the revision of the southern con- 

 stellations, 225. 



Hodges (Dr. J. F.) on the pharmaceutical 

 and chemical characters of the Peru- 

 vian Matico, 202. 



H. R. on Sir J. F. W. Herschel's obser- 

 vations on the entrance-passages in the 

 pyramids of Gizeh, 133. 



Hunt (R.), researches on light, 119. 



Hydruret of copper, on the, 154. 



Indian yellow, on the manufacture of, 

 321. 



Induction, on various phaenomena of, 266. 



Ingram (J. K.) on new properties of sur- 

 faces of the second degree, 188. 



Insecta, on the reproduction of lost parts 

 in, 146. 



Institution of Civil Engineers, proceed- 

 ings of the, 148, 



Ivory (J.) on the diffusion of gases, 55. 



Jets, on the pulsation of, 141. 



J. J., desultory remarks on academic and 

 non-academic mathematics and mathe- 

 maticians, 81. 



Joule (J. P.) on the changes of tempera- 

 ture produced by the rarefaction and 

 condensation of air, 148 ; on specific 

 heat, 334. 



Kemp (A.) on the purification of the so- 

 luble salts of manganese, 519. 



King (R.) on the Fish river of the Polar 

 Sea, 412. 



Komenic acid, on the salts of, 192. 



Leeson (Dr. H. B.) on the circular polari- 

 zation of light by transmission through 

 fluids, 416; on the preparation of flu- 

 oride of iodine, 520. 



Lenses, on a combination of, for the pho- 

 tographic camera obscura, 173. 



Lichens, on the inorganic constituents of, 

 39. 



Liebig (Prof. J.) on the constitution of 

 the urine in man and carnivorous ani- 

 mals, 453. 



