INDEX. . 489 
*Shells, Capt. T. Brown’s description of five new British species of, with a plate. 
Il. *British land and fresh water, Capt. T. Brown’s observations on Mr. 
Kenyon’s paper on, 65, *Mr. Kenyon’s answer to Capt..T. Brown, 220, 
St. Hilaire’s, M. Geoff. opinion on spontaneous generation, 461, 
Siamese twins, notice concerning, 238. 
Siberia, Professor Hansteen’s journey in, 54. Humboldt’s travels in, 60. 
Siliquaria, M. Audouin’s discovery of the animal of the, 146. 
Silver, seleniuret of, found in seleniuret of lead, 75. 
* Slee, Charles, Esq. on the helm wind of Crossfell, 414. 
Snow and ice, causes of the coloration of, 67. 
Society of arts of London, proceedings of, 237. 
Pode me lime, M. G. Barruel on a new natural combination of the carbonates 
of, ; 
* Solar radiation, Mr. W. Baird’s observations on, 173. 
Solar rays, M. Vogel on the action of the, on nitrate of silver, 306. Sig. Carlo 
Matrucci on the electricity of the, 308. MM. Riess and Moser on the mag- 
netizing powers of the, 474. 
South Seas, Capt. Dillon’s voyage in the, reviewed, 350. 
Sow, Messrs. Spittal and Stevenson’s report on the impression made by the 
foot of the, 154. 
Species général des Coléoptéres, par M. le Comte Dejéan, Tom. IV, noticed, 
Spiders, ascent of, in the air, by M. J. J. Virey, 373. On the anatomy of, M. 
Strauss’ researches, 463 
Spittal and Stevenson, Messrs. on the impression made by the foot of the sow, 
154. 
Sprengel, Anth. on the starstones of Chemnitz, 69. 
Spring, analysis of a, near Inverkeithing, by the Rev. W. Robertson, jun. 74. 
Starstones of Chemnitz, Anth. Sprengel on the, 69. 
Statistics, principle in, 372. 
Steam, on the elastic power of, report to the Academy of Sciences, 465. 
Steam-engine, A. Ainger, Esq. on the early history of the, 73 
Strauss’ researches on the anatomy of spiders, 463. | 
Sulphated iron, A. H. Vander Boon Mesch on the crystallization of, 308. 
Saas at solids, Mr. Rennie’s experiments on the friction and abrasion of 
the, 228. 
* Sutherland’s, Mr. Alex. notes of a tour in the island of Jersey, 18. 
ee river, new colony on the, 60, * And the surrounding country, notice of,- 
44 
Szovitts, Mr. J. on the pretended venomous bugs of Miana, (Argas Persicus, }- 
T 
Tznie found in water by M. Baer, 311. 
Tannin and gallic acid, M. Pfaff on the distinctive characters of, 386. 
Tapir, new species of, 70. 
Telescopic observations, 306, 
Texas, notice of the province of, 291. 
*Thermometers, Mr. K. T. Kemp’s description of two new, with a plate, 262, 
On maximum and minimum, by M. Lechevallier, 307. 
Thibet, mountains of, 291. 
‘ Thorina, a new earth, 147... | 
Thorite, a new mineral species, 147. 
Thraulite, analysis of, 75. 
Throstle, (Turdus musicus,) Mr. Macgillivray’s notice of the habits of the, 66. 
Tod, Lieut.-Col. James, on the geography of Rajast’han, or Rajpootana, 361, 
44], - 
Tortuga, nidification of the, 146. 
UV 
Van Dieman’s Land, notice concerning, 290. 
Vauquelin, M. on the formation of acids in vegetables, 228. a : 
_ Vegetables, M. Vauquelin on the formation of acids in, 228. Respiration of, 
-M. Ad. Brongniart on the, 462. 
VOL. Fk aR 
