ALUMINOUS CHALYBEATE SPRING IN I. OF WIGHT. Qg 



Sect. XVII. Conclusion. 



On reviewing and connecting together all the foregoing Ingredient* ia 

 results, it appears tha£ each pint, or sixteen-ounce measure ^J^ ° 

 of the aluminous chalybeate, contains the following in- 

 gredients: 



Of carbonic acid gas three tenths of a cubic inch, grains 

 Sulphate of iron, in the state of crystallized green 



sulphate • '■* 41*4 



Sulphate of alumine, a quantity which, if brought to 



the state of crystallized alum, would amount to • • ♦ • 3V6 



Sulphate of lime, dried at l6o°. 10*1 



Sulphate of magnesia, or Epsom salt, crystallized • • 3*6 



Sulphate of Soda, or Glauber's salt, crystallized l6'0 



Muriate of soda, or common salt, crystallized 4*0 



Silica . • • • * o*7 



I07'4 



I am not acquainted with any chalybeate or aluminous It is analogous 

 spring, in the chemical history of mineral waters, which ^^ OT \ly e 

 can be compared, in regard to strength, with that just green, butthe 

 described. The Hartfell water, and that of the Horley- 2^^' 

 green spaw near Halifax, both of which appear to be ana- 

 logous to this in their chemical composition, and were con- 

 sidered as the strongest impregnations of the kind, are stated 

 by Dr. Garnett to contain, the one only about 14 grs. and 

 the other 40 grs. of saline matter in each pint. 



No doubt therefore can be entertained, that the water, 

 which is the subject of this essay, will be found to possess in 

 a very eminent degree the medical properties, which are 

 known to belong to the saline substances it contains. Indeed 

 there appears to be in this spring rather a redundance than 

 a deficiency of power; and it is probable, that in many in- 

 stances it will be found expedient to drink the water in a 



diluted 



useful means of discrimination, must obviously be liable to inaccuracy 

 as to proportions, wben Very minute portions of silica are to be sepa- 

 rated from considerable quantities of almine Tbi9 however was th« 

 process to »v Inch I trusted on a previous occasion (IX, 8,} to fres tfce 

 alumine from the silica which was mixed with it. 

 Hi 



