132 M. Berzelius on the [Aug. 



tained, because the fluosilicate of lime, which is precipitated 

 by ammonia, contains much less lime than the fluate of lime. 



e. Another quantity of the pulverized sprudelstone was 

 heated to redness in a small apparatus, in which the gaseous 

 substances disengaged were made to pass over fused muriate of 

 lime. The total loss amounted to 2-39 per cent ; of which T59 

 consisted of water, and 08 of carbonic acid. By subtracting 

 the former of these quantities 1*59 from the portion of the dis- 

 solved sprudelstone which was not precipitated by ammonia, 

 it is easy to obtain the quantity of carbonate of lime. Hence 

 we find that the powder subjected to analysis contained per cent. 

 96-77 of carbonate of lime, 006 of phosphate of lime, 0-99 of 

 fluate of lime, and OT of phosphate of alumina. The oxide of 

 tin is here neglected, because it does not proceed from the 

 Avater ; so also is the oxide of iron, because the sprudelstone 

 does not always contain it in the same proportion with the 

 other ingredients of the water, its deposition appearing to be 

 more influenced by the accession of atmospheric air, than by 

 the expulsion of carbonic acid. This is the reason why the 

 sprudelstone contains a variable quantity of oxide of iron, 

 and why it is in general marked with brown stripes. 



According to these data, 1000 parts of the Carlsbad water 

 analyzed by me must. have contained 



Fluate of lime 0-00320 



Phosphate of lime 0-00022 



Subphosphate of Alumina 0-00032 



As no silica is deposited along with the fluate of lime in the 

 sprudelstone, it follows that the water itself contains no fluo- 

 silicate of lime. 



2. Determination of the quantity of Strontian. — I employed 

 for this purpose the liquid which had been precipitated by 

 ammonia, in the foregoing analysis. It was evaporated to 

 dryness, and the saline residue was treated with a slight excess 

 of nitric acid, in order to decompose the carbonate of lime, 

 which had been formed in consequence of the ammonia having 

 absorbed carbonic acid during the evaporation. The nitrate of 

 ammonia was now destroyed by ignition ; and the nitrate of 

 lime, which constituted nearly the whole of the remaining 

 salt, was dissolved out by alcohol. A small quantity of a white 

 matter was left behind ; being dissolved in water and precipi- 

 tated by oxalate of ammonia, and the precipitated oxalate 

 being calcined, it was converted into an earthy carbonate 

 weighing 0-03 gramme. That this was carbonate of strontian, 

 and that it did not proceed from any salt of lime which had 

 been left undissolved by the alcohol, was demonstrated by the 

 following circumstances : with muriatic acid it gave a salt in 



