164 Of the Sulphuk 



low needles. Pour off what is ftill fluid, fave 

 it, and pour on again a pound of oil, and fet 

 it again to digeft, as before ; when the veflel is 

 cold, pour off the fluid, and you will find the 



* fulphur remarkably lefs in quantity : repeat this 

 c four or five times, 'till all the fulphur is dif- 

 c folved. Put all thefe folutions together into a 



* glafs retort, (becaufe the matter is apt, in the 

 c end, to froth much) and diftil for twelve or fif- 

 c teen days and nights, by a very gentle lire, and 

 4 there will come over about 4 of the oil employed, 

 c colourlefs, and quite clear, and with it about 

 c four ounces of a whitifh, ponderous, and vitri- 

 c olic acid water, after this, red drops of oil : then 



* apply another receiver, gradually increafe the 

 c fire, and in feven or eight hours you will have 



* forced off all you well can : inftead of a receiver, 

 c you may employ a glafs retort : molt of the oil 

 ' turns, at laft, very thick and high-coloured, on 



* which ftill floats fomething of a whitifh, highly 

 ' acid water : in the retort there remain betwen 2 



* and 3 ~ ounces of a black, fpongy, mining, in- 

 ' fipid matter, which will neither kindle, burn 



* white, nor fuffer any remarkable lofs in the 

 ' fire/ 



* Re-diftill the matters found in the feveral re- 



' cipients in a very gentle fire, for fome days and 



4 nights, in order further to feparate the remain- 



* ing oil from the acid water : upon the refiduary, 

 ' bituminous, black matter, pour half a pound 



* of good fpirits of wine, and diftil very gently ; 

 c pour again frefh fpirits thereon, and repeat this 



* fo often, 'till what goes over carries along with 

 4 it no more bad fmell.' 



« Thefe 



