390 



INDEX- 



Setlej, account of a survey of the valley 

 of the, 270. 



Sharks, on the size of their teeth, 16. 



Smith, Mr, on a singular phenomenon in 

 vision, 52. 



Smith, Messrs John and Thomas, their 

 description of an improved mortise 

 lock, 350. 



Snails, on the mercantile importance of, 

 188. 



Snakes, on two-headed ones, 1 87. 



Sound, on the polarisation of, 8. 



Sound which accompanies the Aurora 

 Borealis, 74 — distinctness of at great 

 distances, 366. 



Specific gravities, instrument for measur- 

 ing them, 368. 



Stark, John, Esq. on two species of pho- 

 las found near Edinburgh, 98. 



Stars, explanation of their appearing so 

 numerous when seen cursorily, 239. 



Steam engines, on the performance of Mr 

 . Eerkins's, 347. 



Steinmann, Professor, on kakoxene, a 

 new mineral, 1C3. 



Steel plates, method of making impres- 

 sions upon, 346. 



Stephenson, Robert Mr, on new axle- 

 trees, 170. 



Stewart, Robert, Esq. his meteorological 

 observations made in the Isle of Man, 

 231. 



Straton, Major-General, on the great 

 temple of Carnac in Thebes, 54. 



Strength of Materials, observations on Mr 

 Barlow's theory of, 171. 



Strompyer, Professor, on metallic iron 

 anftHs oxides, 300. 



Struve, Professor, on the achromatic re- 

 fractor of Dorpat, 105. 



Sulpho-cyanate of potash, 248. 



Sulphur, crystals of, in galaena, 27, 375. 



Sulphurets, observations on some, 1 10. 



Sun, spots upon the, on 17th June, 245. 



Talbot, H. F. Esq. on coloured flames, 77- 



Temperatures, method of measuring high 

 ones, 316. 



Temperature of the Sandwich islands. 

 370. 



Thenard, M. and Darcet on a process for 

 preserving substances from humidity, 

 169. 



Thermometrical observations at Leith 

 Fort, made every, hour of the day in 

 1824 and 1825, 18. 



Thermometers, mercurial, on the changes 

 which take place in them, 4/. 



Thermometer, register, on a new one, 

 92. 



Thunder storm at Seringapatam, 253. 



Trincomalee, mean temperature of, 141. 



Turner, Dr, his analysis of two varieties 

 of Lepidolite, 162, — on cyanutet of 

 mercury, 245, — on the sulpho-cyanate 

 of potash, 248. 



Uran-bloom, a new mineral species, 185. 



Vapour Engine, on a new one, 347- 



Vaucher, Prof, on the fall of leaves, 330 



Vibrations of solid bodies, as affected by 

 different media, 48. 



Vision, on a singular phenomenon in, 

 52. 



Vision, on the effects of time in modify- 

 ing certain anomalous cases of, 114. 



Vision of impressions on tbe retina in- 

 vestigated, 259. 



Volcanic formations on the left bank of 

 the Rhine, described by Mr Scrope, 

 146. 



Volcanic rocks, account of Mr P. Scrope's 

 arrangement of them, 377 



Wayne, VV. H. Esq. his observations re- 

 lative to the habits of hyanas, 43. 



Weber, M. W. on the polarisation of 

 sound, 8. 



Wells, Dr, his opinions on the vision of 

 impressions on the retina, 265 — demon- 

 stration of their fallacy, 267. 



Wohler, M. F. on the native phosphates 

 and arseniates of lead, 136. 



Zippe, Prof, on uran-bloom, a new mi- 

 neral, 185 — on Levyne, 186. 



Zircon found at Scalpay in Harris, 187. 



Zoological collections, 166. 



EDINBURGH : 

 PRINTED BY JOHN STARK. 



