548 



INDEX. 



Hamilton (C. W.) on Mr. Griffiths' paper 

 on the older stratified rocks near Kil- 

 larney and Dublin, 270. 



Hare (Dr. R.) on certain theoretical opi- 

 nions, 44; answer to, by Prof. Fara- 

 day, on certain theoretical opinions, 54. 



Hauyne, analysis of, 104. 



Hawkshaw (John), further observations 

 on the fossil trees found on the Man- 

 chester and Bolton railway, 541. 



Heat of vapours, on the, 272, 488. 



Hellenin, 230. 



Herschel (Sir J. F. W.), letter to, by Tho- 

 mas Maclear, Esq., on the fall of the 

 cold Bokkeveld meteorite, 142 j on the 

 variability and periodic nature of the 

 star a, Orionis, 311. 



High-pressure steam, on the electricity of, 

 375. 



Hodgkinson (Eaton) on the strength of 

 pillars of cast-iron, and other materials, 

 294. 



Holthouse (C.) on increasing the light of 

 a common Argand lamp, 40. 



Hopkins (Mr.) on certain geological phae- 

 nomena of elevation, and their probable 

 connexion with the existence of vol- 

 canos, 154. 



Horizontal intensity, table of, 426. 



Howard (Luke) on certain variations of 

 the mean height of the barometer, mean 

 temperature and depth of rain, connect- 

 ed with the lunar phases, in the cycle 

 of years from 1815 to 1823, 143 ; tables 

 of variation, of the mean height of the 

 barometer, mean temperature, and depth 

 of rain, as connected with the prevail- 

 ing winds, influenced in their direction 

 by the occurrence of the lunar apsides, 

 294. 



Hunt (Robert) on the use of hydriodic 

 salts as photographic agents, 202, 260 ; 

 list of salts used by, 206. 

 Huyghens' principle applied to physical 



optics, Mr. R. Potter on, 243, 431. 

 Hydriodates of potassa and soda, on the 

 use of, as photographic agents, 207 ; 

 of iron, lime, manganese, baryta, 208. 

 Hydriodic acid, on the use of, as a photo- 

 graphic agent, 208; salts, 202, 260; 

 solutions, 207. 

 Hydrochloric and sulphuric acids in elaeo- 



liths, 113. 



Hydrogen, carbo, on the iodide of a new, 1. 

 Hydromellonic acid and metallic oxides, 



231,238. 



Hyposulphurous acid, uncombined, 77. 

 Hyracotherium, on the locality of the, 



226. 



Ichnology, 524. 

 Ichthyosaurus, description of the soft parts, 



and of the shape of the hind fin of the, 

 69. 



Igneous rocks, 518. 



Induction, on magneto-electric, 281, 356. 

 Inulin, on the composition of, 126; ana- 

 lysis of, 127. 

 lodate of potash in iodide of potassium, 



detection of, 316. 



Iodide of a new carbo-hydrogen, on the, 

 1; of potassium, detection of iodate of 

 potash in, 316; of silver, use of, as a 

 photographic agent, 264. 

 Iodine in cod oil, on the presence of, 78. 

 lodo-ferrocyanate of potassa pure, table of 



precipitates with the, 201. 

 Ireland, south of, on Mr. Weaver's paper 

 relative to the mineral structure of the, 

 161. 



Iron, hydriodate of, on the use of, as a pho- 

 tographic agent, 208 ; on the strength 

 of pillars of cast, 294. 

 Italy, climate of, and other countries in 

 ancient times, 92; vegetation of ancient, 

 92. 



Jacobi (M.), comparative measure of the 

 action of two voltaic pairs, the one cop- 

 per zinc, the other platina-zinc, 241. 

 Jeffreys (Julius) on the solubility of silica 



by steam, 299. 



Johnston (James F. W.) on the iodide of 

 a new carbo-hydrogen, 1 ; on the con- 

 stitution of the resins, part 4, 147, part 

 5, 383 ; on the constitution of pigotite, 

 and on the mudesous and mudesic acids, 

 382. 



Kane (Dr. R.) on the theoretical consti- 

 tution of the compounds of ammonia, 

 120; on the chemical history of archil 

 and of litmus, 299. 



Kater (Capt. H.), astronomical clock in- 

 vented by the late, 293. 

 Katzenbuchel, white elaeolith from, 111. 

 Kilpatrick Hills, minerals found in the, 



406. 



Kilpatrick quartz, 417. 

 Killarney and Dublin, on the older strati- 

 fied rocks near, 270. 



Knox (George James), justification of Mrs. 

 Somerville's experiments upon the mag- 

 netizing power of the more refrangible 

 solar rays, 153. 



Kreil (Prof.), deductions from the first 

 year's observations at the magnetic ob- 

 servatory at Prague, 418. 

 Lampic acid, on the formation of, 76. 

 Langlois (M.)on hyposulphurous acid, 77. 

 Lawson (H.) on the appearance of the 



comet, as seen at Hereford, 309. 

 Lazulite, analysis of, 105. 

 Lead Hills, occurrence of nine species of 

 lead ore in, 402. 



