In the Pyrites. 165 



* Thefe diftillations, performed with fpirits of 

 c wine, carry with them, from the black bitu- 



* minous matter, thofe parts of the fulphareous 

 c acid, that would not come over at the frrft : 

 1 now as the fpirits may, together with the acid, 

 € difcharge all the rank fmell, which folutions of 

 c fulphur commonly have, fo I am pcrfwaded, the 

 c acid of the fulp bur may be the caufe of this into- 



* lerable flench : ' (in part, indeed, not folely, 

 but with the addition of a burning fattinefs.) 



c Now, in order to guefs at the quantity of the 

 c acid and fait procurable from four ounces of rlow- 

 c ers of fulpbur^ I took two ounces of fait of tartar, 

 c well dried, and diffolved in common water; I 

 c poured thereto all the whitifh acid water, pro- 



* cured from the faid fulphur ; and, after efferve- 

 1 fcence, evaporation, and drying, I obtained as 

 € much fait as came to above three drachms, fix- 

 1 teen grains.' 



Then, according to this procefs and calculus 

 nitherto, there are in four ounces of fulp bur ', three 

 drachms and fixteen grains, provided M. Hom- 

 berg has employed enough of the fait of tartar, 

 and fomething of the y#//>/w- fait unentered into it, 

 did not remain behind, as the alcali, employed for 

 the purpofe, appears to me to have been too 

 little. 



* The firft remaining black matter I put into 

 e a crucible before the blaft, and ignited it, when, 

 ' indeed, it fumed a little, and fmelt of burnt 

 1 fulphur^ alfo was encreafed about two drachms, 

 c but found unchanged in the leaft, either in co- 

 4 lour, tafte, or fponginefs. 



M j I I after- 



