3^0 Dr. Pearson on expectorated Matter. 
[c) . The tincture thus obtained was distilled readily till 
there remained about five ounces measure in the retort, and 
what remained seemed to be chiefly water instead of spirit, 
with such a quantity of matter dissolved in it, as not to afford 
liquid by distillation, without frequently spirting into the re- 
ceiver. The residuary liquid was therefore evaporated to the 
consistence of a soft resin-like extract of a black colour,* 
which had a salt with bitter taste. 
The distilled liquid had a peculiar pungent smell, but not 
that of ammonia, and it neither reddened turnsole paper, nor 
rendered violet cloth green. 
(d) . The resin-like extract ( c ) weighed 140 grains. It was 
semi-transparent — dissoluble in water, but not coagulable in 
boiling water — it grew softer on exposure to air — it was un- 
crystallizable — it betrayed no signs of alkalescency nor of 
acidity, except just giving turnsole paper a reddish hue — under 
the blow-pipe it burnt like matter from animals, and afforded 
a fused globule, which indicated muriate of soda, and a large 
proportion of potash, deliquescing very speedily — with lime, 
it emitted the smell of ammonia — with phosphoric, and also 
with tartaric acid, on being heated, an acid smell was per- 
ceived which I at first mistook for acetous acid, for I soon 
found that no such acid was present, not being able to detect 
a trace of any acid in the distilled liquid from these mixtures 
— on the addition of acetite of lead, a very copious precipi- 
tation of fawn-coloured sediment instantly took place, with 
the smell most distinctly of apples. The decanted liquid of 
this mixture was found to be chiefly acetite of potash. On 
dropping diluted sulphuric acid upon the fawn-coloured sedi- 
ment, it constantly emitted the smell of apples. I could not. 
