[see] 
referved the two quarts of liquor, laft added, for fubfequent 
experiments. 
Arter repeated affefions of cold water, when the characters 
of acidity were fcarcely any longer perceptible, I threw the de- 
pofited: matter on a filter and fuffered it to dry for fome time, 
it was then of a dark greenifh colour, fomewhat clammy like moift 
clay. I took a fmall portion of it and added to it fixty times its 
weight of boiling water, but not a particle of it was diffolved. 
The remainder I dried in a fand heat; it then affumed a fhining 
black colour, became more brittle, but internally remained of a 
greenifh yellow, and weighed 13 ounce. 
By treating eight quarts more of the faturated ley in the fame 
manner, I obtained a further quantity of the greenifh depofit, on 
which I made the following experiments : 
ft, Having digefted a portion of it in rectified fpirit of wine, 
it communicated to it a reddifh hue, and was in great meafure 
diffolved; but by the affufion of diftilled water the folution be- 
came milky, and a white depofit was gradually formed; the black 
matter diffolved in the fame manner. 
2dly, Neither the green nor the black matter was foluble in oil 
of turpentine or linfeed oil by a long continued digeftion. 
3dly, The black matter being placed on a red hot iron, burned 
with a yellow flame and a black fmoke, leaving a coaly re- 
fiduum. 
G 4thly, 
