484 
Meridian, are of measurement. of,- in 
India, 295, ; 
Meteoric phenomena described by Dr. 
Clarke, on, 472. 
Microscope, improved, description of, 
52: 
Mineral species on, 126. 
Minerals, new, on, 1xxvii—analysis of, 
on, xxix. 
Mists, on the formation of, 305. 
Mohs, Prof., observations by, on Corn- 
wall, 311. 
Montagu, Col., ov some new and rare 
species of fishes, 133. 
Morp iia, on,lvi, Ixvii, 153—equivalent 
number for, 155—carbonate of, 309. 
Moss-water, supposed to prevent the 
dry rot, 67, 
Mountains, on the barometrical mea- 
surement of, 300—on the thermome- 
trical measurement of, 468, 
Muriates, on, lxiii, 
Muriatic acid gas, experiments on, 26, 
285. 
Murray, Dr. John, on muriatic acid gas, 
26, 285—defence of his theory of 
acidification, 125, 
Murray, Mr., on dew, &c. 385—on the 
thermometrical measurement . of 
heights, &c., 468. 
N. 
Naphtha, vapour of, elasticity of, 216 
—latent heat of, 213, 
Nephrite, meagre, analysis of, 311. 
Nitre, effect of common salt on the solu- 
bility of, in water, 157. 
Nitric acid vapour, latent heat of, 218. 
Noises, subterraneous, at Haddam, in 
Connecticut, 144, 
oO. 
Oak found in iron ore beds in Derby- 
shire, 221, 
Ocythoe, on the genus, 220, 
GErsted, Prof., on the identity of che- 
mical and electrical forces, 368, 456. 
Organization, on the causes of, 136. 
Oxygen, on the combination of, with 
acids, 1, 5, 9. 
Oxymuriate of lime, on, 182, 
P, 
Parhelia, on, 443. 
Paris, deathsin, during 1817, 69. 
Pendulum, inverted, by Mr. Hardy, 142, 
Penzance, meteoro!ogical journal at, 
207, 
Persul phates of iron, Ixiii, 298, 382. / 
Petit, M., on the measures of tempera- 
ture, and the laws of the communica- 
tion of heat, 112, 161, 241, 321, 
Phillips, Mr. W., on the chalk cliffs 
opposite Dover, 141—»n the crystals 
of sulphate of barytes, 141, 
Index. 
‘ 
Philosophical Transactions for 1818, 
analysis of, 208, 300. 
Phosphates of i iron, analyses of, 310. 
Phosphorus, xxix—on the acids of, 210. 
Picrotoxine, on, lvii. | 
Platinum, on, xlii—method cf purify- 
ing, 70—fusion of, 229—specific 
heat of, 167—alloys of,.469. 
Plombgomme, composition of, 381, 
Polychroite, preparation of, 388. 
Pound, Mr., on constructing a catalogue 
of the fixed stars, 302—on the paral- 
lax of certain stars, 305, 
Porrett, Mr., on sulphuretted chyazic 
acid, 356. 
Potash, carbonate of, on; 1x—ferro- 
chyazate of, on, Ix. 
Potatoe plant, top of, dyes yellow, 73. 
Potters’ clay from Halkin hills, 233— 
composition of, 382. 
Prechtel, M., on the fusion of platinum, 
229, 
Problems, mathematical, 188. 
Proteorrhachius, on the skeleton of, 
3TT. . 
Prout, Dr., on the phenamena of san- 
guification, and of the blocd in 
general, 12, 265—on an acid prepared 
from the uric acid, 303. 
Purpuric acid, account of, xlvii, 303. 
Pyrites, white, or radiated analysis of, 
469. 
Pyro-mucic acid, on, lv. 
Q. 
Quartz, fibrous, 465. 
R. 
Radicle, on the direction of, 252. 
Raia chagrinea, 133. 
Rainbow, on the formation of, 131, 
Ravensheugh, description of, 66. 
Redhead, mineralogy of, 64, 
Red sandstone, old, in Scotland, 138, 
Red-wine, colouring matter of, on, 1xx. 
Renney, Mr., onan aurora borealis seen 
at Sunderland, 71. ; 
Reumic acid, the same as oxalic, lv, 71. 
Rice, on, Ixviii, 
Rice, E. W. M. A.B. on the weight of 
a cubic inch of water, and the sp. gr. 
of atmospherical air, 539, 
Ridolphi, Marquis of, on the purifica, 
tion of platinum, 70. 
Robinson, T. Esq., on an oak found in 
iron ore beds in Derbyshire, 221. 
Robiquet, M., on the action of iron on 
water, 68. 
Roses, British species of, 150. 
Ross, Capt., on the variation of the 
compass, 220. 
Royal Society, meetings of, 67, 140, : 
a 305, 377—office bearers in, 140. 
