ALUMINOUS CHALYBEATE SPRING tN I. OF WIGHT. Qj 



2. In hopes of obtaining more satisfactory results, I had Treatment 

 recourse to the following process: five ounces of the water wlthsiJod ™** 

 were boiled with a solution of succinate of ammonia till the 

 whole of the iron and alumine were precipitated*. The 

 Time was precipitated by oxalate of ammonia, and the mag- 

 nesia by ammonia. The solution was then concentrated 

 over a lamp, and gradually evaporated to dryness in a platina 

 crucible. A white pungent smell arose, and on raising the 

 heat to redness, these fumes took fire and burnt with a blue 

 flame, till the whole was fused and reduced to a fixed saline 

 mass mixed with a black coaly matter. Distilled water was 

 poured upon this mass, and the solution filtered. This clear 

 solution being now evaporated and dried at a gentle heat-* 

 so as to obtain the salts in a crystallized state, the mass 

 weighed 6'3 grainsf, which would give 20 grains of alkaline, 

 salts in a pint of the water. The centre of this mass exhi- 

 bited no distinct crystallization, though from its appearance 

 and disposition to effloresce, it evidently, contained sulphate 

 of soda; but the circumference was strewed with numerous 

 and perfectly regular crystals of muriate of sodaj. 



3, This 



* This is a long operation, because the iron does not combine with 

 the succinic acid at a low degree of oxigenation, so that the mixture 

 must be long digested with access of air, or repeatedly boiled and al- 

 lowed to stand in the air for some hours during the intervals, befon? 

 the process can be completely effected. This operation necessarily 

 requires one or two days, but is remarkably accurate as to the precipi- 

 tation of both the iron and alumine. 



f This was the combiued result of two separate experiments tried on 

 three and two ounces of the water, the first of which yielded 3 5 grains, 

 and the other 2"8 grains of alkaline salts. 



| This result shows the compatibility of muriate of soda With sul- Muriate of 

 phate of iron, the latter being in excess, which has been questioned soda corn pjrff- 

 by some chemists. Being desirous of obtaining a confirmation of this , wtt , ~ 

 by a direct experiment, I mixed together solutions of two parts of 

 sulphate of iron and one part of muriate of soda. The mixture be- 

 came yellowish, and on applying heat reddish flakes subsided. On 

 separating these by filtration, and repeating this process two or three 

 times, I nevertheless obtained by evaporation distinct crystals of 

 muriate of soda, partly cubic, partly octohedral, deposited in the 

 centre of a saline yellowish mass, without any appearance of efflor- 

 escence or of any thing resembling sulphate of soda. Therefore nm- 

 riate of soda is compatible with sulphate of iron, although these two 



'ifcdjts 



