b^-} 11-4.0 



248 Mr. George's Aiialysis of a Sulphuretted Water. 



5. Into the solution after the sepaiation of the precipitate 

 (No. 3.) dropped a solution of nitrate of silver : a precipitate 

 of chloride of silver fell down, weighing after fusion 7*9 grs. 



6. Upon the 3 grains insoluble in water (No. 2.) poured di- 

 lute nitric acid : the whole was dissolved with effervescence, 

 and was again entirely precipitated by oxalate of ammonia. 



The contents of tlie water are : 



Carbonic acid in 51 grains of carbonate of 



rytes and 0*3 gr. of carbonate of lime 

 Sulphuric acid in 9 grs. of sulphate of barytes . 3'05 

 Muriatic acid indicated by 7"9 grs. of chloride )^ , „^ 



of silver j 



Soda 20-48 



Lime -17 



Existing in the water as 



Carbonate of soda 27*40 



Sulphate of soda 5-00 



Muriate of soda : . . . 4-25 



Sulphate of lime 0-41 



Loss 1-44 



38-50 

 The loss appears to be partly occasioned by the different 

 hygrometric states of the substances ; the salts resulting from 

 evaporation being highly deliquescent, and requiring great care 

 during their evaporation, to prevent the decomposition of the 

 carbonate of soda: while the precipitates of carbonate and sul- 

 phate of barytes and chloride of silver, retaining moisture with 

 much less tenacity, were dried at a higher temperature. 



It is probable that the soda exists in the water as a bicar- 

 bonate, the excess of carbonic acid being given out in the 

 state of gas, during the evaporation required to perform the 

 analj'sis. The water examined presents two striking pecu- 

 liarities, the large quantity of carburetted hydrogen, (this 

 gas although supposed to occur in mineral waters, was only 

 very lately proved to exist, by the experiments of Mr. West, on 

 the water of the Crown Spa at Harrogate,) and in the saline 

 contents the large amount of carbonate of soda. I shall not 

 offer any conjectures on its source ; but only remark, that I 

 have detected its existence in many waters of the Yorksliire 

 Coal-district. 



St. Peter's Hill, Leeds, 

 Jan. 1, 1827. 



LII. Aj}- 



