400 INDEX. 



maica, 70. Of the height of the Pico-Ruivo, in the island 

 of Madeira, 75—82 

 Salts, (artificial) observations on the primitive forms of, 282 



—288 

 Scroope r(G. P. Esq.), account of the eruption of Vesuvius, in 



October, 1822, 175—183 

 Heebeck (M..), new experiments of, on electro-magnetic action, 



374 

 Sensation, experienced at great altitudes, 386 

 Sensitive Plant, remarks on, 387, 388 

 Serullds (M.), on the hydriodide of carbon, and a new method of 



obtaining it, 297—301 

 Shells, Lamarck's Genera of, 23—52 ; 216—258 

 Societies, proceedings of; the Royal Society, 104; 292, 293. 



The Horticultural Society, 105—107 

 Sodium, (Sulphuret of) experiment on, 149. Preparation of so- 

 dium, 379, 380 

 Soldering of sheet iron, new process for, 142 

 Solima territory, geographical notice of, 171 

 Sonorous chords, on the oscillations of, 374, 375 

 Specula of reflecting telescopes, mode of protecting, 52 — 54 

 Stars, (principal) predicted, and observed places of, 135 

 Stereotype plates, new process for casting, 138 

 Stockler's (Mr.) Inverse method of limits, 357 — 360 

 Strontiicm, (sulphuret) composition of, 149. Test for stron- 

 tium, 383 

 Succinic acid, discovered in tnrppntine, 161 

 Sugar, action of animal charcoal in the refining of, 156 

 Suqa7'-loaf MonntAin, Sierra Leone, barometical measurement of 



the height of, 67—69 

 Sulphate (native) of iron and alumina, analysis of, 389 

 Sulphurets produced from sulphates, experiments on, 147 — 151 

 Sulphuric-acid, on the fixedness of, 383 

 Sulphur-spring, analysis of a new one at Harrogate, 82 — 89 



T 



Tassaeri (M.) on the combinations of chtomic acid with pot- 

 ash, 310, 311 



Tenacity of iron wire, remarkable instance of, 136. Remarks 

 on, 373, 374 



Test for proto-salts of iron, 382 ; for barytes and strontla, 383 



Thenard's blue, preparation of, 381 



Thermometers, variation of, 160 ; 369—371 ; 371, 372 



Time of conjunction in right ascension, an easy method of com- 

 puting, from an observed occultation, 360, 361 



Toad, instance of one found in a solid rock, 386 



Tongue, irritability of, 385 



Touchstone, analytical examination of, 315, 316 



