Description and Analysis of a Meteoric Stone. 265 



acid was poured than was sufficient to take up the soluble 

 parts : when the effervescence ceased, which happened in 

 about 24 hours, a light gelatinous looking matter floated 

 in the solution ; a portion also rested on tlie surface of the 

 carthv part at bottom. This was carefully coilected on a 

 filter J washed and dried it weighed 3-50; when thrown 

 on a hot iron it burned with a blue flame accompanied 

 with a sulphurous srneil, and a fixed residuum that weighed 

 two grains was left beh'nd, so that one grain and a half of 

 sulphur only had been separated. When the earthy inso- 

 luble part was washed, and dried in a gentle heat, and then 

 thrown into a red-hot crucible, a slight smell of sulphureous 

 acid was very sensible; therefore the whole of the sulphur 

 was not obtained in the first instance: perhaps, if we allow 

 half a grain to the earthv part, we shall be nearly accurate. 



The gas extricated during the solution of the stone, from 

 its strong hepatic smell must have carried away much sul- 

 phur: to ascertain the quantity, I collected the whole of the 

 gas given out by 100 grains of the stone in different jars 

 over mercurv, and washed it in lime-water as it was re- 

 ceived in successive portions : much of the gas was con- 

 densed in most of them, yet no lime was thrown down. 

 The quantity of the condensable gas gradually decreased as 

 the solution advanced, until at last little or no diminution 

 took place,. 



The gas thus washed was deprived of the hepatic smell, 

 and presented to flatne burned with an explosion. It was 

 remarkable, that after the explosion took place the com- 

 bustion continued descending gradually in the jar with a 

 beautiful red flame, uutil it reached the surface of the lime- 

 water at the bottom. This phasnomenon induced me to 

 suspect some carbonic matter in the gas; but on closing the 

 jar as soon as the comhustic^n ceased, the surface of the lime- 

 water showed no appearance of carbonic acid. 24 cubic 

 inches of gas were obtained in all, and of these six cubic 

 inches were sulphuretted hydrogen. This quantity uwit at 

 least contain two grains of sulphur. From the toreij;oing 

 staienient the proportions of the different substance* con-^ 

 tamed in ihc stone are as' follow : 



Silex 48-25 



Iron 39' 



Maunesia 9* 



Sulphur 4* 



Mickel , 1-75 



102- Three 



