iSO Ohservatiojis vpon Sulphurous Mineral IVatcrs, 



Another observation equally remarkable concerns the suvT- 

 phtirettcd hydrogen gas. 



M. Ginibernatj a Spanish chemist, has asserted, that the 

 hot springs of Aix-la-Chapelle contain sulphuretted azotic 

 gas, — M. Schaub attempted to extract it from the sulphu- 

 rous waters of Nenndorf in Hesse. The following charac- 

 ters have been attributed to this gas : — 1st, A smell similar 

 to the sulphuretted hydrogen gas; 2d, Being indecomposa- 

 ole by the carbonic acid gas ; 3d, Not being inflammable ; 

 ♦Jth, Being improper for supporting an inflamed body ; 5th, 

 Being indecomposable by the nitrous gas ; 6ih, Being de- 

 composed by the concentrated nitric acid, which separates 

 sulphur from it; Jth, Decomposing the metallic solutions, 

 and forming sulphurets ; 8th, Having a great affinity for 

 water, from which it cannot be separated, except by long 

 ebullition. 



But M. Westrumb has found that when we wash sul- 

 phuretted hydrogen gas with lime-water, or when we pass a 

 current pf this gas through slaked lime, it acquires all th^ 

 above properties. 



Whether the sulphuretted hydrogen gas be obtained from 

 sulphurous waters, or be prepared in any other way in use, 

 the same phaenomena take place. 



On bringing back t!ie lime-water by an acid, sulphuretted 

 hydrogen gas is liberated, which is inflanniiable, and which 

 possesses its ordinary properties. 



Sulphuretted azotic gas is therefore a product of the ope- 

 ration. 



M. Westrumb does not yet know if this new gas be pro- 

 duced by the action of quick-lime upon sulphuretted hydra- 

 gen o-as, or if this substance does not contain sulphuretted 

 azote. 



Lastly, a third observatron not less interesting Is the pre- 

 sence of carbon aiid carbonated substances in the sulphu- 

 rous mineral waters. 

 ' ":M. Westrumb has discovered a new principle In them-^ 

 0, fetid resin of sidpfnir, (Stlnkendes schwefelharz.) 



In order to obtain it, we must evaporate the sulphurous 

 -^ater excluded froui fhe contact of the air, and afterwards take 



