INDEX. 427 



flotation, (magnetic) experiments on, 385, 886 

 Royal Society, proceedings of, 296-307 

 Rust, preservative against, 396 



Sabine, (Capt. Edward) analysis of his work on experiments to 



determine the figure of the earth by means of the pendulum, 



vibrating seconds in different latitudes, and on various other 



subjects of philosophical inquiry, 141-159 

 Salisbury. See Moveable Rocks 

 Salt on the shore of the Severn, notice of, 201 

 Scrope, (G. Poulett, Esq.) considerations of, on volcanoes, 356- 



374 

 Selenium, found in the sulphur of the Lipari Islands, 174, 175 

 Sepia, experiments on the black principle of, 181 

 Severn, geology of the river, 413,414 

 — — , notice of salt, found on the shores of the river, 201 

 Sliooting stars, seen in the day-time, on the nature of, 168 

 Smoky chimneys, method of curing, 376 

 Solatium pseudo-quinia, chemical examination of, 181, 182 

 Solar eclipses and occultations of the planets by the moon, in the 



year 1826; elements for computing, 327, 328 

 South, (James, Esq.) examination by, of the large achromatic of 



the Royal Observatory at Paris, 286-288 ; on the apparent 



distance and position of 460 double and triple stars, 297- 



299 

 Spohn's, (Professor) remarks on his essay, De Lingua et Literis 



Veterum Egyptiorum, edited by Professor Seyffarth, 4to., 



Leipzig, 1825, 159, 160 

 Stars, observations on the apparent distance and positions of 



460 double and triple, 297-299 

 Steel, explanation of the cutting of, by iron, 383-385 

 and iron, observations on the solution of, in acids, and on 



the residua which remain, 395, 396 

 Sulphur, of the Lipari Islands, existence of selenium in, 174, 175 

 Sulphuric acid, hygrometric property of, 400 

 Swainson, (William, Esq.) monograph by, of the genus Tachypho- 



nus, a group of birds belonging to the Tanagra of Linnaeus, 



60-69 ; observations by, on the Tyrant Shrikes of America, 



267-285 



Tachyphonus, a monograph of the genus, 60-69 



Thomson, (Dr. Thomas) attempt of, to establish the first prin- 

 ciples of chemistry by experiment, — analysis of his work, 113; 

 remarks on his historical introduction, 117; on the specific 

 gravities of oxygen and hydrogen gases, and his mode of expe- 

 rimenting, 121-129 ; remarks on his experiments on the atomic 

 weights and specific gravities of chlorine and iodine, 130-132 ; 

 his tables of nitric acid, ibid.; experiments on the atomic weights 

 of the acidifiable combustibles, 133, 134; of the alkalis and 



