.Mr. HoRiJER on fbe Mineralogy of the Malvern Hills. 315 



Six cubic Inches of the water were boiled for some minutes, and 

 the gaseous contents were received over mercury. On the admission 

 of caustic potash, no absorption took place. The transparency of 

 the water remained undisturbed. 



The following tests produced no change. Litmus paper, violet 

 paper, turmeric paper, lime water, muriate or nitrate of barytes, tinc- 

 ture of galls, and prussiate of potash, even after the addition of a little 

 muriatic acid. 



Caustic potash, oxalate of ammonia, and nitrate of silver, all oc- 

 casioned a turbidity. On the addition of barytic water, there is also 

 a cloudiness, even after the v/ater of the spring had been boiled ; 

 although neither muriate nor nitrate of barytes produced any effect. 

 Super-carbonate of ammonia with phosphate of soda occasioned at 

 first no change ; but after standing for some time, the rod left white 

 streaks wherever it was drawn along the sides of the glass vessel. 



Eight ounces of the water slowly evaporated to dryness, yielded 

 0.75 gr. of solid ingredients. On adding cold distilled water to this, 

 only a small part was re-dissolved. To the solution the following 

 tests were applied: 



a. Violet paper, slightly changed to green. 



b. Oxalate of ammonia, no change. 



c. Muriate of barytes, a cloudiness. 



d. Nitrate of silver, a dense precipitate, 



e. Super carbonate of ammonia with phosphate of ammonia, a 

 slight cloud, and the rod produced white streaks on the sides of the 

 vessel. 



f. Nitrate of lime, a considerable precipitate. 



g. There was no change produced by tincture of galls, or by 

 prussiate of potash, even after the addition of muriatic acid. 



To the residuum insoluble in water there were added ; 

 2 R 2 



