3S6 Notices respecting New Books. 



of this acid by acidifying a given quantity of sulphur, and then' 

 combining it with tlie barytes of a known quantity of some so- 

 luble barytic salt. The analysis of sulphat of barytes depends 

 also on that of carbonat of barytes, out of which all the barytic 

 salts are prepared. By multiplied experiments the author fixes 

 the elements of carbonat of barytes at 



Carbonic acid 21-6 — 100 



Barytes 78-4 — 363 



100-0 463 

 "Of this carbonat, 100 parts (containing 7^'4 of base) gave 

 from 11 8-6 to 119 parts of sulphat of barytes, which will give 

 for the elements of sulphat of barytes within Tiro-iru- of the fol- 

 lowing numbers : 



Sulphuric acid 34 — 100 

 Barytes 66 — 194 



100 294 



" Bucholz acidified 100 parts of fused sulphur with nitro- 

 muriatic acid, and by combining with barytes the sxdphuric acid 

 thus produced obtained 724 parts of sulphat of barytes. If this 

 sulphat is estimated according to Berzelius's result above given, 

 its acid part will be 246-16, whence 100 parts of sulphur will 

 have combined with 146*16 of oxygen, and this estimation of 

 sulphuric acid will be found to correspond almost exactly with 

 that already given as found by the acidification of sulphuret-of 

 lead. 



" Sulphureous Acid. The production of this acid by the di- 

 rect combustion of sulphur being attended with nearly insupe- 

 rable difficulties, Pr. Berzelius attempted its analysis by means of 

 the sulphite of ammonia. This salt was decomposed by muriat 

 of barytes, and the resulting sulphite of barytes was changed to 

 the sulphat of barytes, by means of nitric acid, none of the sul- 

 phureous acid being expelled in the process. By these and other 

 experiments the author determines the elements of sulphureous 

 acid to be Sulphur 50-57 — 100-00 



Oxygen 49-43 — 97-83 



100-00 197-83 

 ^' The oxygen in the sulphureous acid is therefore to that in 

 the sulphuric acid very nearly as 1 : 1^; as 100 parts of sulphur 

 unite with 97*83 of oxygen in the sulphureous, and with 146-426 

 in the sulphuric, and 79-83 x H- = 146-785. 



" Copper with Sulphur and Oxygeir. The author proceeds to 

 examine the compounds of copper with sulphur and oxygen, to 

 ascertain whether they agree with those of lead in the three laws 



of 



