[ *74 ] 
quantity of fyrop of violets, without giving it the lead 
red tint; reducing it, on adding fome drops of ole- 
um tartari per deliquium, it fuffered no remarkable 
change. Spirit of fait did r.ot occafion any alteration 
in it. But with oil of vitriol there was a ftrong effer- 
vefcence, without any fenfible fume. 
It appears from the above experiments, that the Co- 
imbra extradt of Hemlock contains one fifth foluble 
in fpirit of wine, i-ths of which confifl of an oily 
eflential fait, the remainder being a refin. 
EXPERIMENT II. 
The extradt of Hemlock from Vienna was fofter 
than that from Coimbra; on breaking it, there ap- 
peared fmall whitifh ffreaks on each furface. 24 
grains of it, treated as in the former experiments 
with fpirit of wine, gave a fine deep green tindlure, 
which on evaporation gave a refiduum of a dark 
green towards the edges of the cup and a dark brown 
towards the middle; the whole refiduum when dry 
weighed two grains and jj. ; on leaving it expofed to 
the air, the brown matter attracted moifture from it 
and relented into a thick brown liquour; on adding 
water to it, as in the experiments on the Coimbra 
extradt, the folution was of a light green colour ; on 
evaporation it gave J^ths of a grain of dark brown 
refiduum, which ran per deliquium into a brown 
liquour, differing only in colour from that obtained 
by a fimilar procefs from the Coimbra extradh The 
undiffolved refinous matter weighed 4 grain, was of a 
greenifh colour, but in other refpedts like the refin 
of the Coimbra extradt. It appears from the green 
tindlure 
