Account of Sutlon Spa. 6S 



on paper u-lth the above solution, auJ exposed to ilic vapour 

 of the fresh water, became visible, of a light brown colour, 

 by the action of hepatic air or sulphurated hydrogen gas. 

 Some silver leaf exposed to its vapour became famtly yellow, 

 and a globule of bright quicksilver was slightly tarnislK'd. 

 But a solution of nitrated silver produced merely a white 

 precipitate, turning blue on exposure to light ; the usual 

 effect of the muriatic acid ; the quantity, therefore, of he- 

 patic air is probably very small. 



A portion of the water, evaporated slowly, formed 

 beautiful cubic crystals, which, with a drop of sulphuric 

 acid, gave out the peculiar smell and gray fumes of the nm- 

 riatic acid. 



From a gallon of the water fresh from the well, were ob- 

 tained eight ounces, or about 14.yV'o'V cubic inches of vola- 

 tile contents, of which about one-eighth part extinguished 

 flame, precipitated lime water, and was evidently carbonic 

 acid. On applying to the remainder (which was no' soluble 

 in water by repeated agitation) the flame of a candle, a 

 slight combustion took place, and afterwards the flame 

 burnt nearly as well as in conmnon air. One measure of 

 this air, mixed with an equal bulk of nitrous air in an ac- 

 curate eudiometer, was diminished from 200 to l.TirJV» 

 while the common air of the room, added to nitrous air in 

 the same proportion, was lowered to 1 •x'lnj'Vs its purity being 

 in a direct ratio to the degree of diminution. It was there- 

 fore atmospheric air, with a slight mixture of sulphurated 

 hydrogen gas, and somewhat more than the usual portion 

 of azote, as is always the case with the air of chalybeate 

 waters. 



A wine gallon of the fresh water being evaporated to 

 dryness, there remained of residuum 2 ounces 3 drachms, 

 or 1320 grains ; this, mixed with 12 ounces of cold distilled 

 water, left on the filter 12 grains of a reddish brown sedi- 

 ment. 



Caustic ammonia added to the clear solution did not 

 precipitate any magnesia worth collecting; but mild kali, 

 threw down a copious sediment of aerated lime, which, on 

 ex-iccalion, weighed 206 grains ; and must, according to 

 Bergman and Kirwan, have been produced from 226 grains 

 of umriated lime, the former containing -,i-'j partf? of pure 

 lime, and the latler -J-J'^ of muriatic acid. 



Subtracting this, and the twelve grains of brown resi- 

 duum, from the w^hole, there remain in a gallon of tlir. 

 water 1082 grains of muriate of soda or eonnnon salt. The. 

 ) 2 grains of residuum, treated with diluted niarine acid, 



c? and 



