48 On Saliwaters of Alleghany and Keskeminetas Valleys. 



and no precipitate is produced in the lead solu; 



5. The gas obtained by boiling the water reddened litmus paper in- 

 stantly, but not permanently. The same gas conducted into limewater 

 caused a strong turbidness, and afterwards produced a precipitate which, 

 •while effervescing, was perfectly soluble in muriatic acid. 



6. The addition of acids produced a slight escape of air bubbles. 



7. Sulphuric acid produced a strong turbidness and quickly caused a 

 precipitate which when repeatedly boiled with water was resoluble, leav- 

 ing a very small quantity of- a white sediment. This sediment proved to 

 be baryta when treated before the flame of the blowpipe, and particularly 

 -when some chlorate of potash was added ; the changing color of the 

 flame satisfied me that the sediment also contained strontia. 



8. Lime-water made the brine turbid, but by adding an excess of the 

 latter the mixture became clear again. 



9. Sesquichlorid of iron produced a red-brown tint. 



10. Caustic ammonia produced a dirty white precipitate, which was 

 partly soluble in a solution of salammoniac. 



11. The carbonates of potassa and ammonia produced permanent 

 whitish precipitates. 



12. Chlorid of barium produced a strong turbidness, which by adding 

 diluted nitric acid disappeared, air bubbles being expelled. 



13. Oxalate of ammonia produced a copious white precipi 



} addit 



15. Nitrate of silver produced a copious, white, caseous precipitate, 

 soluble in caustic ammonia, and giving an opalescent liquid. Nitric 

 acid had but a very slight effect upon the precipitate. 



16. Gallic acid produced, after some standing, a violet tint. 



17. Tannic acid produced, after some standing, a reddish-violet tint. 



18. Ferrocyanate of potassa produced, after standing, a slight bluish tint. 



19. Sesquiferrocyanate of potassa produced, after standing, a greenish 

 tint. 



20. Hydrosulphuret of ammonia produced, after standing, a greenish 



21. When some of the brine was slightly acidulated by muriatic acid. 

 and some of the reagents mentioned under 16 to 20 added to it, then 

 the different tints were produced instantly. In No. 20 was formed, alter 

 a few hours, a blackish precipitate, in voluminous flocks. 



22. A solution of gypsum produced in the brine, when slightly acidu- 

 lated with nitric acid, a marked turbidness, which after a few hours settled 

 into a precipitate. This precipitate, when washed with water and dried, 

 and treated before the flame of the blowpipe, showed to be a mixture of 

 strontia and baryta. 



23. The chlorids of platinum and gold, had not the slightest effect oa 

 the fresh brine. 



24. Chlorid of palladium produced in the brine, after the latter iiad 

 been slightly acidulated with nitric acid and after standing for a short 



