1819.] taken out of a Boiling Spring uniting with the Sea. 29 



III. Analysis. 



1 . Five hundred gr. of the water were evaporated to dryness, 

 and the saline residuum exposed to a heat of about 500°. It 

 weighed 22f gr. 



2. From a bottle of water which had been taken out of the 

 boiling spring, and which had remained in my possession for 

 nearly two years, I had no reason to expect any great quantity 

 of sulphuretted hydrogen gas. I put 12 cubic inches of it into 

 a small retort, and boiled it for nearly an hour. The gas extri- 

 cated did not amount to a quarter of a cubic inch ; and of this 

 only a small proportion was sulphuretted hydrogen. The tube 

 containing this gas being wide, I did not attempt to determine 

 the exact proportion of this gas that had been extricated ; but 

 was satisfied with ascertaining that the quantity was quite 

 trifling. 



3. From 500 gr. of the water, the sulphuric acid was precipi- 

 tated by means of muriate of barytes. The sulphate of barytes 

 after being washed and dried in a red heat weighed 1*12 gr. 

 Indicating 0*38 gr. of sulphuric acid. 



4. From 500 gr. of the water the lime was precipitated by 

 means of oxalate of ammonia. The oxalate of lime obtained 

 weighed 4*94 gr. It was heated to redness in a covered plati- 

 num crucible, mixed with sulphuric acid, and then exposed for 

 some time to a strong red heat. The sulphate of lime thus 

 obtained weighed 3*67 gr. Indicating 1*54 gr. of lime. 



5. Five hundred gr. of the water which had been freed from 

 their sulphuric acid and their lime, by the methods indicated 

 above, were evaporated to dryness, and the remaining saline 

 mass fused in a platinum crucible. It now weighed 21*58 gr. and 

 was common salt. 



IV. Conclusions from the Analysis. 



I have no doubt, from the observations made by Dr. Murray, 

 in his paper on the analysis of sea water, that all the sulphuric 

 acid which I obtained existed in the water in combination with 

 soda ; and that all the lime was combined with muriatic acid. 



Now an atom of sulphuric acid = 5, and an atom of soda 

 = 4. Therefore we have 5:4:: 0*38 : 0*304 = soda in combi- 

 nation with the sulphuric acid. Of course the sulphate of soda 

 (supposed destitute of water) in 500 gr. of the water amounts to 

 0*684 gr. 



An atom of lime weighs 3*625, and an atom of muriatic acid 

 4*625. Therefore, for the muriatic acid united to the lime, we 

 have 3*625 : 4*625 :: 1*54 : 1*965 = muriatic acid in combination 

 with the lime. Hence the muriate of lime in the water, suppos- 

 ing it anhydrous, amounts to 3*505 gr. 



The whole of the common salt obtained by evaporating the 

 500 gr. of water, freed from their sulphuric acid and (heir lime, 



