4 ^4 -A' 1 Anahfis sf livo mttterai Springs 



takes place. It is, that a precipitate, feemingly like fh« 

 former, has been made by the addition of the muriatic acid; 

 but by the addition of more acid the precipitate is re-dif- 

 folvcd. Sometimes, indeed molt commonly, I have not 

 been able to effect this appearance. 



It was natural to expect the folution of any further un- 

 common obfervation in the fame matter that had already 

 explained fo much. 3. I accordingly digefted fulphat of 

 lime in the hepatifed folutions of iron and manganefe; and 

 I found that the latter had a very (Irang folvcnt power. Af- 

 ter the liquor had been filtered, fulphat of lime was plenti- 

 fully precipitated by fulphuric acid. The folution of iron 

 ft ems to have fomething of a fimilar propertv; but as it is 

 very i'mall, and as iron has almolt always a little manganefe 

 united with it, it is at leaft uncertain whether the whole 

 effect dugHt not to be attributed to manganefe. 



It remains to compare this remark with the effects of the 

 artificial oxygenated falts; and -thus to confirm, if coniinna-. 

 tion were needed, the analogy which I have laboured to- 

 ilifh. 4. Sulnhatof lime was digefted with the oxyge- 

 nated muriat of manganefe and diftilled water by a gentle 

 heat : after 24 hours the clear liquor was feparated : into 

 this I dropped a little fulphuric acid; by degrees a huge 

 quantity of fulphat of lime was feparated. iVIurkitic acid 

 was dropped into the fame liquor, but it did not feparate any 

 thing. The oxygenated muriat of iron poflefied the fame 

 property,, but in fo I'mall a degree, that here again I am in- 

 clined to attribute this power to a little manganefe attached 

 to the iron. It follows from thefe facts, that the large quan- 

 tity of fulphat of lime is kept in folution by the fait of man- 

 ganefe. And a further examination of the reliduum itfelr 

 thews that it contains the triple fait of manganefe and iron. 

 5. Some of the refiduum was perfectly edulcorated, and ful- 

 phuric acid was dropped upon it; the vapours of muriatic 

 acid arofe, and were rendered evident by paper moifteneu 

 with ammoniac or with fimplc water. To the fulphuric 



acid. 



