574 
Liquids, on an apparatus for the circular 
polarization of light in, 241. 
Literary and Philosophical Society of 
Liverpool, proceedings of the, 232. 
Logan (W. E.) on the coal-fields of Penn- 
sylvania and Nova Scotia, 66. 
Lonsdale (Mr.), notice of the labours of, 
511. 
Lyell (Mr.) on the geology of North Ame- 
rica, 547. 
Macclesfield (Earl of), notice of the late, 
300. 
MacCullagh (Prof.), award of Copley medal 
to, 154; on a mechanical theory of cir- 
cular and elliptic polarization, 399, 
492. 
Magnesian sulphates, on the hydration of 
the, 334. 
Mallet (R.) on an application of the elec- 
trotype process in conducting organic 
analysis, 439. 
Manures, report of some experiments with, 
470. 
Marchand (Dr.) on the dimorphism of 
sulphur, 54; on the composition of 
human bones, 236. 
Mercury, action of chlorides and air on, 
75; on the biniodide of, 209, 297; on 
the photographic properties of, 250. 
Metals, new method of precipitating, in the 
state of sulphurets, 237. 
Meteorological observations, 79, 159, 239, 
327, 415, 503. 
Mialhe (M.) on the action of chlorides and 
air on mercury, 75. 
Milky Way, observations on the, 81. 
Miller (Prof. W. H.) on the form of cry- 
stals of tin, 263. 
Mineralogy :—Erythrite, 188; Perthite, 
189; peristerite, ib.; silicite, 190 ; gym- 
nite, 191; Baltimorite,z4.; acadiolite, 192; 
prasilite, 193; Jeffersonite, 194; occur- 
rence of native lead in Ireland, 234; on 
the form of the crystals of tin, 263; 
augite, 370; hydrotalcite, 371; He- 
denbergite, ib.; stearite, 372; native 
gold, 499 ; fahlerz containing mercury, 
500 ; arsenio-siderite, 7b.; chrysoberyl, 
501. 
Missourium, observations on the, 56. 
Molecular action, on the theory of, 21, 22, 
116, 194. 
Moleyns (F. W. de) on the sustaining 
voltaic battery, 133. 
Moser’s images, on the formation of, 
324, 
Mossotti (Prof. O. F.) on the constitution 
of the sidereal system, of which the sun 
forms a part, /81. 
Moyle (M. P.) on the force of aqueous 
vapour, 73, 157. 
Murchison (R.I.) on the black earth of 
INDEX. 
Central Russia, 71; on the geology of 
Russia, 527. 
Nerves, observations on the, 483. 
Newbold (Lieut.) on rock basins in South- 
ern India, 62 ; on the geology of Egypt, 
215. 
Nitrogen, on the new method for the esti- 
mation of, 286, 317; combined with 
silicon in soils, 321. 
O’Brien (Rev. M.) on the dispersion of 
light, 21, 22, 116. 
Oil of vitricl, on the various hydrates of, 
330. 
Optics, physical, on a new experiment in, 
Ordnance Survey, observations on the, 35, 
Ornithichnites, observations on, 557. 
Ovum, on the cells in the, 437. 
Owen (Prof.) on the Missourium, and on 
the claims of Tetracaulodon to generic 
distinction, 56 ; on the Dinornis, 558 ; 
on the Mylodon, 562. 
Paraffine, composition of, 235. 
Pascal’s theorem relative to the hexagon 
inscribed in a conic section, demonstra- 
tion of, 168. 
Payen (M.), analysis of the black earth of 
Central Russia, 71. 
Perhydrosulphocyanic acid, composition 
of, 52. 
Peristerite, description of the new mine- 
ral, 189. 
Perthite, composition of, 189. 
Phillips (J.) on some geological phzno- 
mena, 65; on the occurrence of Trilo- 
bites and Agnosti in the lowest shales of 
the paleozoic series, 384. 
Photographic processes, on some new, 5, 
107, 136, 170, 246, 505. 
Photography, contributions to the history 
Of, 946: <6 
Picrotoxine, on the composition of, 320. 
Planets, on a new method of computing 
the perturbations of, 229. , 
Plumbic acid and plumbates, on the, 
497. ‘ 
Polarization, circular and elliptic, on a 
mechanical theory of, 399, 492. 
Portlock’s (Capt.) report on the geology 
of Londonderry, &c., notice of, 521. 
Powell (Rev. B.) on apparatus for the 
circular polarization of light in liquids, 
241, 262; on the elliptic polarization 
of light, 485; on an easy method of 
imitating the Corona, 569. 
Prasilite, composition of, 193. 
Pumice from Mexico, 65. 
Pyrogallic acid, researches on, 279, 417. 
Rainbow, on a double, 442. 
Rainey (Mr.) on the cause of the ascent 
and motion of the sap, 481. 
Rays of the solar spectrum, action of on 
