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Experiment XIII. 
Six ounces of a folution of common fait, infufed for 
24 hours, with half an ounce of the powder of bark, 
received from it a deep red colour, but retained its 
faltiffi tafte. 
Ob. It was intended, that the two above experi- 
ments fhould fhew, whether the fait was precipitated 
from the water, during the folution of the bark. 
Experiment XIV. 
A well-faturated tindure of bark, with redified 
fpirit of wine, being added to lime water in the pro- 
portion of one third, fuffered an immediate decom- 
pofition of its refin, as by common water j and in an 
hour, it made no change on the colour of violet 
paper. 
I was in doubt here, whether the decompofition 
might not arife from an affinity between lime water 
and fpirit of wine, as in common water ; to deter- 
mine which, I made the following experiment. 
Experiment XV. 
The pure refinous fubftance of the bark, put into 
lime water, was immediately diffolved, and the lime 
wat-er reduced. 
Ob. There feems therefore to have been a double 
eledive attradion in the fourteenth Experiment. 
That is, the quick-lime, attrading fixable air, was 
reduced ; and the water, uniting with the fpirit, the 
relin was precipitated. Yet it is an objedion to this 
fuppofition, that Mr. MTride’s experiments prove 
t lie folution of refins to be attended with the lofs of 
their fixable air. 
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