JcXVi. Olservations upon Sulphurous Mineral WaterSi \ 

 By M, Westrumb*. 



jyi. Westhumb has been employed in making researches 

 upon several kinds of sulphurous waters, and latterly upoii 

 those of Eilsen in the county of Schaumbours:. '" ^ ^ 



One of the most interesting facts he has discovered is, that 

 all sulphurous waters contain a greater or less quantity o£ 

 hydro-sulphuret or hme. 



In order to ascertain it, he boiled the mineral water ex- 

 cluded from the contact of the air, in order to expel from it 

 the sulphuretted hydrogen gas and the carbonic acid. 



He afterwards poured into the residue— 



1st, Sulphuric acid, which liberated sulphuretted hydro- 

 gen gas from it ; and sulphat of lime was precipitated. 



2d, Smoking nitric acid, which separated sulphur from it. 



3d, Oxalic acid, which liberated sulphuretted hydrogen 

 gas from it; and oxalate of lime was formed. 



4th, The water evaporated with the contact of ^he dlf^ 

 precipitated sulphat of lime; and the sulphuretted hydro^ii 

 gas was liberated. 



In order to determine rigorously the quantity of the sul- 

 phuretted hydrogen gas and of the carbonic acid, M. West- 

 rumb proceeds in the following manner : — He introduces 

 sulphurous water into a matrass to a certain point, putting a 

 mark upon the level of the liquid ; he adapts a curved tube 

 to it, entering into a long cylinder, which is at one time 

 filled with lime-water, and another time with acetate of lead, 

 with excess of acetic acid. 



The apparatus being thus arranged and well luted, he boils 

 the water, and continues the ebullition until there is no 

 more gas liberated. 



In the first experiment it is the carbonat of lime which is 

 precipitated, 20 grains of which correspond to ten cubic 

 inches of carbonic acid; and in the second case it is oxidated 

 hydro-sulphuret of lead, 19 grains of which indicate ten 

 cubic inches of sulphuretted hydrogen gas. 



* From M. Gehl^n's new Journal of Chemistry, vol. v. 

 Vol. 30. No. 1 1 8. March 1 808. I Another 



