INDEX. 185 



proportion of the neutral arseniate and phosphate of, xiv. 205 ; 

 and of the biphosphate and the binarseniate of, 417 

 Soda, native carbonate of, found in India, xvi. 178 



preparation of the saturated hydro-sulphuret of, xvii. 165 



lake of Lalagunilla, in South America, account of, i. 188. 



The urao, or soda, how extracted, 190. To what uses applied 

 in South America, 191 



Sodalite of Mount Vesuvius, observations on, iii. 165 

 — - effect of light on the colour of, xviii. 179 

 Soda-water, improved apparatus for the manufacture of, iv. 358 

 Sodium (sulphuret of), experiment on, xv. 149. Preparation of, 



379 

 ScEMMERRiNG (M.) on a new mode of mellowing wine, ii. 148 

 Soils, process for analyzing, iii. 193 

 Solanum pseudo-quinia, chemical examination of, xx. ISl 

 Solar spectrum, obseiTations on the rays composing it, v. '77. 

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



year 1826, xx. 327; elements for computing, ib. 

 Soldering sheet-iron, new process for, xv. 142 

 Solids, properties of, i. 9 1 



Solima territory, geographical notice of, xv. 171 

 Solubility diminished by heat, xvi. 165 

 Solution, account of some phenomena attending the process of, 



i. 24. Application of them to the laws of crystallization, 47 

 Solutions, boiling points of saturated, xviii. 89 

 Somervillite, a nondescript animal, account of, xvi. 275 

 Sonorous chords, on the oscillations of, xv. 374 

 Sound, observations on that produced by flame in tubes, &c. 



V. 274 

 ' produced by opening a subterraneous gallery, xvii. 152. 



Experiments on the velocity of, 266. xviii. 162. xix. 108 

 Sounding instruments, comparative value of, vi. 135 

 Souterazi of Constantinople, iiccount of, vi. 350 

 Sooth (James, Esq.), corrections by, in right ascension of thirty- 

 six principal fixed stars, to every day in the year, x. 427. xi. 



186. The clock's daily rate and error at one time of the day 



