PHYSICAL ann LITERARY. et 
when they are diluted with water; fo it may 
be faid, that it contains no alcali, and that 
its turning green with fyrup of violets, is 
of itfelf no. proof; becaufe common water 
does, with fyrup of violets, change to a faint 
green colour, after it has ftood fometime: 
but this l imagine rather to be a proof, that 
there is in common water an alcaline princi- 
ple, viz. abforbent earth; for rain-water, 
or fnow-water, have not the leaft tendency 
_ to green, with the faid fyrup. 
4. IT feems to contain a very little fea falt 
(lefs than common water) by its precipitating 
the folution of faccharum Saturni (11). 
5.11 feems to contain fome portion of a- 
lum. 
«, From the tafte of the Spaw water, as it 
comes from the ‘pring, which is remarkably 
aluminous. 
¢€. From its tafte becoming more alumi- 
nous, when part of the water is exhaled, 
by being expofed tothe air, for between five 
and fix weeks (12). 
y. From its tafte after three fourths of the 
water was evaporated, which was more harfh 
nd aluminous, than that of the frefh Spaw, 
or 
