Prof. Daniell on Sulphuretted Hydrogen 

 Sulphuretted hydrogen 0*67 cub. in. 



Chlorine 106'1 1 grs. 



Sulphuric acid 2*30 



Sodium 7000 



178-4] 



And small quantities of other bases. 



Amount of salts from evaporation . 188 



Specific gravity, 1002-0. 



This is the only case in which the salts were discoloured 

 by vegetable extractive matter. 



8. " River Congo, — water taken about thirty-five miles up 

 that river, by Her Majesty's sloop Wolverine, on the 11th of 

 November, 1839, four days before the customary rains, but 

 light rains having already taken place." 



This water contained no sulphuretted hydrogen, and the 

 sediment in the bottle was only 0-1 grain. 



The amount of saline matter was only eight grains per gal- 

 lon, and consisted of the chlorides of sodium, and magnesium, 

 and sulphate of soda, chiefly. 



Specific gravity 1 000'3. 



" Water from the river Bango, taken [at sea] at forty miles 

 distance from the mouth, by Her Majesty's schooner Fair 

 llosamond, on the 26th of December, 1839, in latitude 8° 33' 

 south, and longitude 12° 41' east." The water emitted a very 

 strong smell of sulphuretted hydrogen. It was tolerably clear, 

 but contained a little gelatinous matter which resembled spawn 

 of fish. The sediment of the whole bottle, however, when 

 dried, only weighed fifteen hundredths of a grain. 



The results of the analysis, calculated for the imperial gal- 

 lon, were as follows : — 



Specific gravity, 1026*4. 

 Sulphuretted hydrogen, 4*35 cub. in. 

 Dry salts, 2736 grs. 



Consisting of chlorine 1513, sulphuric acid 128, neutralized 

 by bases, which have not yet been quantitatively determined, 

 but consisting of sodium, magnesium, calcium, &c. 



" Water taken by Her Majesty's schooner Fair Rosamond, 

 off the Bango and Dande rivers, latitude 8° 29' south, longi- 

 tude 12° 33' east, on the 29th of December, 1839." 



Results of analysis, — specific gravity, 1026'7. 



There was no odour of sulphuretted hydrogen in this water, 

 neither was any detected by tests. The quantity of dry saline 

 matter, per gallon, 2624 grains, consisting of chlorine 1430, 

 sulphuric acid 125*4, neutralized by the same bases. 



