60 Messrs. Merck and Galloway's Analysis of 



1. Estimation of Sulphuric Acid. 



The mineral water was heated with a little hydrochloric 

 acid and chloride of barium added. 



I. 534*199 grms. of water gave l"340grm. of sulphate of 

 baryta = 0'4605 grm., or 0*08620 percent, of sulphuric acid. 



II. 475*003 grms. of water gave 1*1791 grm. of sulphate 

 of baryta = 0*4050 grm., or 0'08526 per cent, of sulphuric 

 acid. 



Mean of the results, 0*08573 per cent. 



2. Estimation of Chlorine. 



The water was treated with nitric acid and precipitated by 

 nitrate of silver ; the precipitated chloride of silver was washed 

 by decantatioUj fused and weighed. 



I. 101 grms. of water gave 0*1137 grm. of chloride of silver 

 = 0*2811 grm., or 0*02778 per cent, of chlorine. 



II. 100*006 grms. of water gave 0*1093 grms. of chloride 

 of silver =0*02702 grms., or 0*02701 per cent, of chlorine. 



Mean of the results, 0*02739 per cent. 



3. Estimation of Silicic Acid. 



To the water was added nitric acid in excess ; it was then 

 evaporated to dryness and the residue for some time heated 

 on the sand-bath. On treating this residue with water and 

 hydrochloric acid, the silicic acid remained behind; it was 

 collected, washed and weighed. 



I. 765*325 grms. of the water gave 0*0342 grm., or 

 0*00446 per cent, of silicic acid. 



II. 732*015 grms. of water gave 0*0289 grm., or 0*00407 

 per cent, of silicic acid. 



Mean of the results, 0*00426 per cent. 



4. Estimation of Iron. 



The iron was estimated, — 



A. In the precipitate formed on boiling the mineral water. 



B. In the water which had not been boiled. 

 Both estimations gave the same results. 

 A.^Estimation of the iron in the precipitate : — 



A certain quantity of the water was boiled for some time ; 

 the precipitate which had formed was washed, dissolved in 

 hydrochloric acid and precipitated by an excess of ammonia. 



I. 777*215 grms. of water gave 0*0079 grm., or 0*00101 

 per cent, of sesquioxide of iron. 



B. Estimation of the iron in the water which had not been 

 boiled : — 



