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a cruft to the Tides of the tea-cup j e> e, e. detached 
cryftals. 
Experiment IX. 
With the acid of tamarinds. 
Having had a prefent of Tome tamarinds in pods, 
from Mr. Arch. Glofter, praditioner in phyfick in 
Antigua, I took out the pulp, and put about two 
pound of it into three quarts of water ; and then fa- 
turated its acid with the alkali, and, after filtrating 
the liquor, I evaporated it to the confidence of a fy- 
rup, and then put it into a cool place for 24 hours j 
when I found that a cryftallifation had actually 
taken place, I feparated the fait from a thick fweetifh 
liquor of the confidence of a fyrup ; after it was 
dried, it had the appearance of a piece of common 
mofs, made up of a number of fmall cryftals difpofed 
in an irregular manner, and mixed with vifcid or fac- 
charine juices. The letters a. a. &cc. of fig. 9. fhew 
Tome pieces of this fait while it remained in this 
form. 
As I fufpeded this fait to be ftill mixed with a 
vifcid matter, I difiolved Tome of it in warm water, 
and cryftallifed it anew, when it had a very dif- 
ferent appearance, for it had fhot into an infinite 
number of very fmall cryftals, which came every 
where from centres. The length of thefe cryftals 
did not exceed half an inch at moft ; they were no 
thicker than horfehairs, or common white thread. 
How many cryftals fhot from each centre I could 
not determine j but, in many places, the cryftalli- 
fation 
