[ 28 ] 
Since receiving the above account, I wrote to Dr.- 
Wood, and begged to know of him what propor- 
tion of fea falts thefe waters contained, and whether 
they had any mixture of a bittern in their compofi- 
tion j and I had the following anfwer* dated Oft. 
17, 1770. 
“ Since I received your letter* I evaporated a 
<c Scotch pint (Lib. iv.) of thefe waters in a white 
(t Hone bafon, and 1 obtained two drachms of a 
“ fait, which always run per deliquium , and would 
“ not cryftallife. I fhall try it again in the fum- 
“ mer, as at this feafon the air, being much charged 
44 with watery particles, may have prevented the 
44 cryftallifatiom. By. dropping a folution of potafh 
44 into three Scotch pints (lib. xii.) of the waters*, 
“ I got eighty five grains of a very fine magnefia.” 
The fix bottles of this water which were fent to 
me, arrivings at a time when I was much engaged* 
they remained for feveral months in the hamper in 
which they were originally packed j and I did not 
try any experiment with the water till the 2d of. 
Oftober laft.. It was then clear and tranfparent as 
the pureft rock water, only it feemed to have fome- 
few particles of light earth fwimming through it.. 
It had then a fetid fulphureous fmell, refembling 
fome what that of a foul gun or of rotten eggs, and, 
it tinged. lil ver in the fame way as the fulphureous 
waters beforementioned; and it had a fulphureous and, 
fight faltifh tafi'e. This fetid fulphureous fmell*, 
talle, and property of tinging filver, which this as 
well as moft other fait waters acquire by keeping, I- 
fufpeft to be owing to a fermentation taking place in 
the water, and fiightly uniting fome of the fine oily 
matter. 
