4!M 



Sea trout, on the growth and migration 

 of, 416. 



Heal fur of commerce, observations on, 

 200. 



Sectors, investigation of, by Professor 

 Wallace. 'J62. 



Seismometer, on the theory and con- 

 struction of a, 3.37. 



Shaw (John). Keraarks on the growth 

 of the fr3' of the salmon, 178. 



on the development and growth 



of the sniraon, 27o. 



on the growth and migration of 



the sea trout (Salmo trutta), 416. 



Shells, a collection of fossil, presented 

 by Chevalier Michelotti. 300. 



Silicon. Re^-earclies on the pi'oduction 

 of silicon from paracyanogen. 341. 



Smith (Mr, of Jordanhilli. Cunimuni- 

 cation regarding a change in the rela- 

 tive levels of the land and sea on the 

 west const of Scotland, 130. 



Farther account of indications 



of changes in the relative levels of 

 sea and land, 153. 



on the newer Tertiary or Plio- 

 cene deposits of Scotland, 263. 



Snow, on the effect of, in apparently 

 increasing the force of solar radiation, 

 322, 374. 



Society, on the supposed progress of 

 human, 382. 



Soils, on the results of the most recent 

 experiments on the conducting power 

 for heat of different, 343. 



Solarium, on the fossil species of the 

 genus, 334. 



Solutions, farther researches on the vol- 

 taic decomposition of aqueous, 326. 



Sound. On the mode in which sound 

 is produced and diffused, 409. 



Spring, intermitting brine, near Kiss- 

 ingen, in Bavaria, 233. 



Specific gravity of certain substances, 

 commonly considered lighter than 

 water. 424. ' 



Stark (James. M.D.) on the identity of 

 the animal matters which form the 

 basis of the animal fluids and solids, 

 353. 



on the existence of an osseous 



structure in the vertebral column of 

 cartilaginous fishes, M)^j. 



on the structure, formation, and 



movement of glaciers. 375. 



(John) on the food of the her- 

 ring and salmon. 170. 



on the supposed pro- 

 gress of human society, 332. 



."<team, on the colour of, by Professor 

 Forbes, 242. 



Sievenson (.\lan). Notice relative to 

 the polyzonal lenses belonging to'the 

 Commissioners of the Northern Light- 

 houses, 49. 



on the visibility of 



rapidly revolving lights, 3;Jti. 



(William) on the geology of 



Cockburn Law, and its ueiglibour- 

 liood. -(70. 



Stone, on the expansibility of different 



kinds of, 95. 

 Storm. Observations made during the 



storm of January 1839, 246. 

 Storms, on the, of November 1838, 264. 

 Sugar-cane, on the cultivation of the, in 



Spain, 346. 

 Suli)hur, notice of a new compound of, 



106. 

 Sutherland (Dr) on the polarization of 



the chemical rays of light, 312. 

 Syme (Prof. J.) on the power of the 



periosteum to form new bone, 153. 



Tagua nut, or vegetable ivory, chemical 



e.xamiuation of the, 451. 

 Tea. Sjiccimens of tea from Assam, 382. 



oil, Dr Thomson on, 156. 



Telescope, on an optical illusion in 



viewing objects through a, 296. 

 Telescopes, on aplanatic, 158. 

 Temperature,diminutionof,with height 



in the atmosphere at different seasons 



of the year, 259. 

 on the use of the word, 



279. 



of the earth in India, 432. 



Tetrao medius, notice of. 395. 

 Thermometers, observations on, in the 



earth, 223, "343. 

 Thomson (Professor Allen) on a con- 

 genital malformation of the auricle, 



and external meatus of both sides, in 



three persons, 4-1.3. 

 •••• (J-. LL.l).). Investigation of 



a new series for the rectification of 



the circle", 216. 



(Rob. D.)on tea oil, 1.56. 



Tilley (Thos. E.j. Notice regarding the 



Indian grass oil, or oil of Andropogon 



Calamus aromaticus, 470. 

 Traill (Dr T. S.). Observations on the 



fossil fishes lately found in Orkney, 



Experiments on magnetic inten- 

 sity made at Liverpool and Manches- 

 ter, 40. 



on a new register anemoscope, 



on a register barometer for in- 

 dicating maxima and minima, .57. 



on the history of the arch, 87. 



on the ruins of Babylon, Part i., 



91 ; Part ii., 93. 



Remarks on the ossiferous Caves 



ofCefn, 176. 



on the composition of anew ink, 



which,'by resisting chemical deletion, 

 promises to diminish the successful 

 falsification of bills, deeds, and other 

 documents, 189. 



on the geology ofOotiland, from 



the observations of Mr Laing, ^6. 



on the means employed to pre-* 



vent forgeries of bank-notes, bills of 

 exchange, cheques, &c.. 285. 



Remarks on a specimen of Cla- 



vagella balanorum (Scacchi). Pre- 

 sented to the Society by Sir T. Mac 

 doiigiil Brisbane, 28^. 



