726 INDEX. 



Secreting Structure, on the ultimate, and on the laws of its function, 295. 



Seismometer, or instrument for measuring earthquake shocks, and other concussions, on the theory 



and construction of a, 219. 



SHAW (Mr JOHN.). On the growth and migrations of the sea-trout of the Solway (Salmo Trutta), 369. 

 Silicon, account of a repetition of Dr Samuel Brown's processes for the conversion of carbon into, 547. 



Experimental researches on the production of, from paracyanogen, 229. 



Society, Royal of Edinburgh, Proceedings of the extraordinary general meetings, and list of members 

 elected at the ordinary meetings, since November 1840, 677. 



List of the present ordinary members in the order of this election, 692. 



List of non-resident and foreign members, 699. 



List of honorary members, 700. 



List of members deceased, resigned, and cancelled, from 1840 to 1844, 702. 



List of donations, continued from Vol. XIV., 703. 



Specific Gravity of certain substances commonly considered lighter than water, 387. 

 STARK (JAMES, M.D.). On the existence of an osseous structure in the vertebral column of cartila- 

 ginous fishes, 643. 



STARK (JoHN, Esq.). On the supposed progress of human society from savage to civilized life, as con- 

 nected with the domestication of animals, and the cultivation of the cerealia, 177. 



T 



Tagua Nut, or vegetable ivory, chemical examination of the, 541. 



Terrestrial Magnetism, account of some additional experiments on, made in different parts of Europe 



in 1837,27. 



Theorems General, analytical discussion of Dr Matthew Stewart's, 573. 

 TILLEY (THOMAS GEORGE, Phil. D.). Notice concerning the Indian grass-oil, or oil of andropogon 



calamus-aromaticus, 639. 

 TRAILL (T. S.,M.D.). Notice of the fossil fishes found in the old red-sandstone formation of Orkney, 



particularly of an undescribed species, Diplopterus Agassiz, 89. Examination and analysis of 



the berg-meal, or mineral flour, found in the parish of Degersfors, in the province of West 



Bothnia, on the confines of Swedish Lapland, 145. 



Vibrations, on the, of an interrupted medium, 511. 



Vision, on the knowledge of distance by binocular, 663. On the law of visible position in single and 



binocular, 349. On the conversion of relief by inverted, 657. 

 Voltaic Decomposition of Aqueous and Alcoholic Solutions, further researches on the, 151. 



w 



Water, on the action of, upon lead, 265. On the presence of organic matter in the purest waters from 



terrestrial sources, 417- 

 Waves, on the theory of, 101. 

 WILSON (GEORGE, M.D.). Account of a repetition ofDr Samuel Brown's processes for the conversion 



of carbon into silicon, 547- 



Y 



YOUNG (Mr ANDREW.). On the growth of grilse and salmon, 343. 



