344, ESSAYS ann OBSERVATIONS 
Ow the 3d, there was more of the brown- 
ifh powder at the bottom; all the parts of the 
bowl, which were covered with the water, 
were tinged yellowifh; a pellicle covered the 
furface of the water, and all the fpangles 
were gone. 
On the 6th, the fharp aluminous: tafte 
was pretty ftrong, but the chalybeate tafte 
much weaker; there feemed to be no more 
of the brownifh powder at the bottom than 
there was on the 3d; the yellow fubftance 
that adhered to the bow] was alfo thicker, 
and had a fmooth oily look; the pellicle on 
the top had now acquired the thicknefs of 
writing paper; it was eafily taken up, as it 
adhered'to any thing put into it, and was ofa 
golden colour: I took up’as much of the 
water as filled a wine glafs; and, with pow- 
der of galls, it immediately flruck a blue. 
On the 13th, the fharp aluminous tafte 
ftill remained ftrong, but the chalybeate was 
fearce to be diftinguifhed; the quantity of the 
precipitate, and the pellicle on the top, were 
much the fame; but the yellow fubftance, 
adhering to the bowl, was rather more: into 
a glafs of this water, I dropt fyrup of violets; 
it turned of a faint green: to another glafs 
of 
