[ r 73 ] 
EXPERIMENT I. 
24 grams of the extract of .Hemlock- prepared 
at Coimbra, di gelded with an ounce of highly rec- 
tifyed fpnit of wine for 36 hours in a warm room, 
gave a brownifh yellow tindure ; the clear liquor be- 
in? poured oft, a frefh quantity of fpirit was added 
as^ before, and expofed to digeftion for the fame fpace 
of time ; the fecond tindure was confiderably lefs 
coloured j this, added to the former tindure, was fil- 
tered, and expofed to the air in a warm room 
until the fpirit was intirely evaporated ; the dry re- 
fiduum weighed five grains ; on expofing it to the 
air it became lofter, and even moift at the furface. 
On pouring fome water on the refiduum now 
moift, it was foon tinged of a brownifh yellow, 
which being poured off, and a frefh quantity added 
at different times, until an ounce and a half of wa- 
ter had been ufed, there remained fome blackifh 
matter not foluble in water, which when dry weighed 
one grain, did not attract the moifture of the air, 
melted and burned with a bright flame when ex- 
pofed to the hre, was foluble in fpirit of wine, and had 
every charaderiff ic of a rezin. 
The tinged water, which had been feparated from 
this rezin and filtered, was evaporated flowly, until 
a brown dry matter remained weighing three grains, 
which in afew hours attracted themoiffure of the air, 
and relented into a dark brown thick liquour, of a 
feline tafte, and the fmell peculiar to the extrad of 
Hemlock. One drop of this liquor, diluted with a 
little water, deflroyed the colour of ten times the 
quantity 
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