PHYSICAL any LITERARY, 321 
vitriol, which raifed a bubbling and effervef- 
cence. In diftillation there came over fix. 
drachins of liquor, of a brownifh colour, with 
a little oilinefs upon it: its tafe was fowre, but 
ee ee a att a 
_ difagreeable and empyreumatic ; it had an un- 
pleafant fmell, but not very ftrong or pun- 
gent ; it effervefced with alcaline falts fixt or 
volatile : in all which properties it agrees with 
the acid liquor drawn by diftillation from 
crude tartar, which is commonly called _ its 
fpirit. 1 obferved, in diftilling this mixture, 
that there came up fome volatile falt, but in 
very {mall quantity, which fpread itfelf upon 
the neck of the retort, in very fine and fub- 
tile ramifications: the upper part of the bo- 
dy of the retort was fullied with fome thick 
black oil ; and the faline matter at the bottom 
wasof a dirty afh colour, like tartar half-burnt. 
1 poured warm water into the retort, and 
Jeft iton hotfand, to diffolve the falt ; I found 
it neceflary to pafs this folution through a 
filter, and there remained in the paper a good 
deal of black earthy matter. The liquor was 
very acid, and had a vitriolic roughnefs, 
_becaufe more oil of vitricl had been poured 
upon the tartarus folubilis than was fafficient : 
to overcome the acidity, I dropt into.the li- 
§ f quor 
