132 Olservations tcpon Sulphurous Mineral IFaters. 



residue of the evaporated sulphurous water, the penetrating 

 arnell is manifested, when it is taken up by the alcohol. 

 But several observations lead M. Westrumb to think that 

 the alcohol does not contribute to the formation, and that 

 it rather derives its origin from the sulphur itself. 



Letter ofM^RoLOFF, of Magdehourg, upon the foregoing 

 Suljj^ct^, 



I HAVE recently recognised in an unexpected manner the 

 sulphuretted fetid resin of M. Westrumb. 



M. Michaelis, after having precipitated the golden gul- 

 phat of the hydrogenated sulphuret of antimoniated potash, 

 evaporated the liquor floating above containing the sulphat 

 of potash. ' 



When the ley began to concentrate, a vapour was deve- 

 loped, which very much embarrassed the artist who was 

 stirring the mass. There was at the same time manifested 

 an insupportable smell, analogous to that of burnt assa- 

 foetida. 



The saline mass evaporated to dryness had a gray colour, 

 and the remarkable smell we have mentioned. 



It was put in digestion with alcohol, which acquired the 

 taste and smell of garlic. 



The alcoholic liquor evaporated spontaneously, yielded a 

 gray gluey rar.ss, possessing the same smell and taste, 



I am desirous that this experiment should be made pub- 

 lic, not knowing if M. Westrumb is acquainted with the' 

 formation of a large quantity of fetid resin which may be 

 easily procured by this process. 



As the smell is mainifested before putting in the alcohol, 

 we may conclude, with M. Westrumb, that the alcohol does 

 not contribute to its formation. 



■ "* From Gehlen's cevv Journal of Chemistry. 



XXVII. On 



