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fation rofe into fmall oblong, oval, or roundidi tufts, 
made up of an infinite number of the fmall crystals 
that fhot from the centre towards the circumference. 
Some of the concentrated liquor having been 
accidentally left in a faucer, and on the iides of a 
tea cup at night, next morning the liquor in both 
velfels had fhot every where into fmall fine cryffals, 
that came like radii from a centre; in fome places 
they had compleated the circle, in others only half,, 
and in others only the two oppof te quarters. 
I treated thr^e pound of Eaft-India tamarinds, 
which I bought in a fhop in Caftle* Street, in the 
fame manner ; only, after they were faturated with 
the alkali, and the liquor filtrated, it was fet by for 
fome weeks, and then filtered again before it was 
evaporated. The people of whom I bought thefe 
tamarinds told me, that there was no fugar mixed 
with them ; and I believe what they faid was true, 
for I obtained eafily a very pure and fine fait from 
them. Having at firft carried the evaporation too 
far, as foon as the liquor was removed from the 
fire, it immediately began to concrete in form of a 
number of fmall circles on the furface of the liquor, 
which were fuccefiively fucceeded by others, till 
the whole became one folid mafs; but on diffolving 
this mafs in water, and evaporating only a little, and 
fetting the liquor in a cool place to allow the falts 
to concrete, the cryftallifation began on the furface 
of the liquor, in form of fmall circles or liars, and I 
obtained a fait in every refpedt fimilar to the former. 
The general appearance of this fait is reprefented 
by b 3 b, in fig. 9, and the different appearances in 
different parts of the cryftallifation by c> c. 
Expe-- 
