102 Mr. Horner on the Brine Springs at Droitwtcb, 



§ 11. PreUmlnary Experiments with Reagents. 



a. Tincture of red cabbage — no change produced.* 



b. Litmus paper — no change. 



c. Turmeric paper — no change. 



d. Lime water — no change. 



e. Nitrate of barytes — a considerable white precipitate. 



f. Oxalate of ammonia — a w^hite precipitate. 



g. Ammonia — a slight turbidness. 



h. Neutral carbonate of ammonia — a white precipitate. This 

 was separated by filtration, and on the addition of phosphate 

 of soda to the clear liquor, a slight turbidness was produced, 

 and, after a little time, a rod drawn along the glass vessel 

 left white streaks. 

 /. Succinate of ammonia — no change. 

 k. Tincture of galls, a turbidness, but no blackness. f 

 /. Prussiate of potash — no change, even after the addition of 



muriatic acid. 

 m. After the brine was boiled briskly for some minutes, it re- 

 mained perfectly transparent, and had deposited no sedi- 

 ment. 

 The brine, therefore, does not contain any uncombined acid, 

 (by Exp. a. b. d.) nor uncombined or carbonated alkali, (by Exp. 

 a. c.) nor earthy carbonate or oxide of iron, (by Exp. m,) nor 

 Iron in any other state of combination, (by Exp. /. k. I.) 



As a farther proof that it does not contain either an earthy car- 

 bonate, or oxide of iron, the crust left at the bottom of the pan 



* This experiment was made on the spot. 



t This turbidness was evidently owing to the alcohol of the tincture. 



