r of Alleghany and Keskeminetas Valleys. 4 

 t settled to the bottom in form i 

 I had no effect upon the brine, either in tb 



When t 



carbonato of soda, a white turbidness was produced, which by heating in- 

 creased, turning to a yellow color. 



b- Properties of the brine after heating. 



_ About 40 pounds of the fresh brine were put into a large porcelain 

 dish and brought cautiously and by degrees nearly to the boiling point 

 and evaporated, until salt crystals made their appearance, besides tha 

 reddish-yellow powder obtained soon after the commencement of the 

 evaporation. The sediment together with the liquid was put upon a fil- 

 ter, and the first was edulcorated with pure water, and then dried. The 

 filtered solution was marked a a, and the dried ptecipit ,t j b b. 



a, a. The solution, or the filtrate a. a. was subjected to the folloicing experiments. 



1. Reaction perfectly neutral. 



2. Caustic ammonia produced a voluminous and perfectly white pre- 

 cipitate, entirely soluble in a solution of salammoniac. 



3. Carbonate of potassa produced a perfectly white precipitate, which 

 increased when the mixture was boiled. 



4. Chlorid of barium produced no change. 



5. Oxalate of ammonia produced a copious white precipitate. 



. 6. By adding to the liquid, filtered from the precipitate of No. 5, caus- 

 tic ammonia and phosphate of soda, and then stirring it well, a crystal- 

 line white precipitate was obtained. 



"7. Nitrate of silver produced a white precipitate with a slight yellow- 

 ish tint. This precipitate when mixed with nitric acid and well stirred 

 and filtered, and submitted to a slow and very careful neutralization with 

 caustic ammonia, no yellow precipitate could be produced. 



8. Gallic and tannic acid, ferrocyanate and sesquiferrocyanate of po- 

 tassa, and hydrosulphuret of ammonia, did not change the solution in 

 the least. 



9. Some of the liquid by evaporation was more concentrated and after 

 cooling mixed with an alcoholic solution of platinum-chlorid, by which a 

 yellow precipitate was obtained- To prevent errors, a second portion of 

 tbe liquid, of which the alkaline earths were pecipitated by carbonate of 

 soda, the mixture evaporated almost to dryness, then again treated with 

 water, filtered, and the solution so obtained concentrated again by a slow 

 evaporation. By adding to this solution a small quantity of a spirituous 

 solution of chlorid of platinum, a lemon-calored precipitate was also 

 produced, which consisted of a combination of chlorid of potassium and 

 ^'f platinum, together with a combination of chlorid 

 of platinum. 



10. Another part of the filtrate was evaporated almost to ( 

 t>7 heating it in a test tube, with a concentrated solution of 



^»- Jour. Sci.— Second Series, Vol.. XXXIV, No. IOO.-July, 1 



