388 



INDEX. 



Storm, extraordinary one, at St Peters- 

 burgh, described, 367. 



Sulphuric acid, anhydrous, on the forma- 

 tion of, 244. 



Sun, spots on the, in 1824, 172 — Paral- 

 lax of the, «173 — singular colour of 

 the, 173. 



Sword Fish, 187. 



Temperature of the sea and the air, in a 

 voyage from St Helena to England, 

 240. 



Thermometer, differential, of Leslie, in- 

 vented by Professor Sturmius, 144. 



Thorn, Mr Robert, on a new self-acting 

 lever sluice, 10(1 — on a waster sluice, 

 102 — on a double valve sluice, 288. 



Tides, table of, in Van Diemen's Land, 

 213. 



Titanium, metallic, 181. 



Torrelite, a new mineral, 181. 



Trona, the native carbonate of soda, de- 

 scribed, 325. 



Trap, on its distribution in Scotland, 236. 



Turner, Br E., his ana'ys sof euchroilr, 

 301. 



Tympanum of the ear, on its uses, 300. 



Uranite, Analysis of, 372. 



Vallance, his apparatus for freezing wa- 

 ter described, 148. 



Vapour of water on its deoxidating qua- 

 lity, 369. 



Waddell, Mr A., his description of a 

 boat .with a revolving paddle scull, 

 206, 3G3. 



Water-proof processes, 150. 



Wernerian Society, proceedings of, 170. 



Whewell, llev. W., his general method 

 of calculating the angles of crystals, 

 312. 



Winds, on their influence upon the ba- 

 rometer, 241. 



Withamite, a new mineral, 218. 



Wooden ornaments, methjd of making 

 them by casting, 342. 



Wright, Colonel, on the regular varia- 

 tions of the barometer, 335. 



DESCRIPTION OF PLATES IN VOL. II. 



PLATE I. Map of the Countries North of the Sutluj. 



PLATE II. Figs. 1. and 2. Diagrams illustrative of the Vision of Impres- 



sions on the Retina. 



Fig. 3. The Marquis of Worcester's Steam Engine. 



Fig. 4. A Species of the genus Urocerus, found in Wood. 



Fig. 5. The Migration of Caterpillars. 



Figs. 6. and 7- Represent Sluices, invented by Mr R. Thom. 



Figs. 8, 9, 10. Structure of the Cryphasa Erecta. 



Fig. 11. Structure of Rice Paper. 



Fig. 12. Black-lead Mine of Glengarr)'. 



Fig. 13. Microscopes made of the Lenses of Animals. 



Figs. 14, 15, 16. A remarkable Parhelion. 



Fig. 17- Vallance's Ice Apparatus. 



Figs. 18, 19. Represent the Tubular Organs in the Heads of 

 Sharks and Ruys. 



Fig. 20. Sturmius's Differential Thermometer. 

 PLATE III. Illustrates Mr Haidinger's Paper on the Regular Composition of 



Crystals. 

 PLATE IV. Fig. 1. Mr Waddell's Revolving Paddle Scull. 



Figs. 2, 3. Effect of Wind on the Barometer. 



Fig. 4. Mr Thomas Clark's Quicksilver Pump. 



Figs. 4, 5. Represent the New Double Valve Sluices, invented 

 by Mr Robert Thom, Rothesay. 



Figs. 6, 7, 3. Rev. Mr Somervi'le's Contrivances for preventing 

 the Accidental Discharge of Fire-Arms. 



Fig. 10. Mr Ritchie's Photometer. 



Fig. 11. Mr Jeffery's Patent Flue for Furnace?. 



Fig. 12. Jenning's New Self-closing Gas Burner. 

 PLATE V. Illustrative of the Genus Hookeria. 



PLATE VI. Shows the Figures produced by the Vibration of Elastic Mem- 

 branes, according to Savart. 

 PLATE VII. Represents Frauuhofer's Great Achromatic Telescope. 

 PLATE VIII. Represents the various New Minerals described in this Number. 



