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“PHYSICAL ann LITERARY. 345 
of the fame, I put powder of galls 5° it im- 
mediately: ftruck.a blue’ tincture, ‘but: not fo 
eee as on the 6th. i 
On OGober oth, it had a more teliaeeshs 
} tatte, than the frefh Spaw water. ; the chaly- 
beate tafte. was fcarce to be diftinguifhed ; 
the precipitate, yellow :fub{tance adhering to 
the bowl, and the pellicle’ on the furface, 
much the fame as on the 13th wit; the wa- 
ter was as limped as on the firft day; fyrup of 
violets changed its colour to a deeper green 
‘than before, and, with powder of galls, it 
immediately gave a blue. tincture. 
13. I boiled a chopin of) this Spaw water, 
in a,clean'tin pan} till there. remained of. it 
-only one fourth part ; it turned of a yellow- 
ith colour and was muddy: when. this was 
4 cold, and the okry flakes precipitated, it had 
- -aharfher and more aluminous tafte than the | 
freth Spaw water, or than that which had 
been fo long expofed to the air (12.). Toa | 
glafs of this I put powder of galls; it 
_ changed very flowly, and, after it had ftood 
_ about eighteen hours, it exhibited a faint blue. 
14. In aclean tin pan, over the fire, I e- 
_-vaporated a chopin of the fame Spaw water, 
 tillthere remained only about one ounce and 
Ax 2 
