l6o Experiments on Charcoal, 



By pouring, according to the advice of C. Berthollcf, a 

 little of hydrogcnated fulplmr into an acid, we obtained a pre- 

 cipitate of fulplmr of an oily appearance, but fimilar to a 

 pattc, and which foon loft all the fulphurated hydrogen gas 

 it contained : it then became folid like common fulphur, 

 which is verv different from carburated fulphur, as the latter 

 has no imell of fulphurated hydrogen, and when pure fcarcely 

 leaves any refiduum. 



Thefe experiments fcem to us fufficiently decifive to con- 

 clude that carburated fulphur contains no fulphurated hy- 

 drogen . 



The fpcciflc gravity of this liquid muft vary; we found it 

 once to be 13, that of water being ten. 



Carburated fulphur inflames with great facility. It emit? 

 a ftrong odour of fulphurous acid; depofus a little fulphur, 

 which then burns; and there remains black combuftible 

 charcoal as ufual. 



This body, on paffing into an ignited glafs tube, experi- 

 ences no feniible alteration. 



It evaporates at the ufual temperature, and greatly in- 

 creafes the volume of the air — nearly as much as ether. Ifc 

 exercifes the fame aelion on oxygen, azotic, hydrogen, and 

 nitrous gas. It renders them all inflammable, but does not 

 fcem to 'prod me on them any particular alteration*. 



The oxygen which holds carburated fulphur in gas, deto- 

 nates with a prodigious force — incomparably greater than that 

 produced with hydrogen. We hoped to be able to employ 

 this method to dofc the condiment principles of this body, 

 but we did not think it prudent to operate this detonation in 

 clofe vcfiels. Thefe verfels ought to be exceedingly ftrong, 

 and even then, if of glafs, the experiment would be attended 

 with danger. 



The air which has diflblved carburated fulphur fuffers it 

 to burn quietly. 



As we have' mentioned the differences between carburated 

 fulphur and hvdrogenated fulphur, we muft not conceal a 

 fefemblance which we have found between them. 



Nitrous gas which holds in folution carburated fulphur 

 gafified by it, is inflammable like the other gafes ; but the 

 colour and beauty of its flame are peculiar, they can be com- 

 pared only to that of zinc, which burns with rapidity. 



* This evaporation of carburated fulphur takes place exaclly in the 

 fame manner as tnat of ether; it is proportional to the volume of the g s, 

 arid crocs nor depend on t he nature of i: : this affords a new reafon for oe- 

 iitving it probable that the cafe is the lame with the evaporation of water. 



Sulphurated 



