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When I faw it, it confifted of two fprings, which 
were very well ordered by Mr. Williamfon, fo as to 
run from two wooden fpouts, immediately at their 
rife out of the earth ; which indeed muff be of very 
great advantage to all mineral waters : and I am per- 
fuaded there are many, whofe medical qualities are 
greatly impaired by falling into refervoirs, and con- 
tinuing in them for fome time after they fpring from 
the earth. The one of thefe fprings was fituate about 
ten or twelve yards further up the brook than the 
other ; and they were then diftinguifhed by the 
names of the upper and lower fpring : but I have 
been fince informed, that their fituation is now al- 
tered. Each of thefe fprings did at that time run 
nearly the fame quantity of water, which, as I 
thought, was above an Englifh quart in a minute, 
and that during a feafon of very dry weather. . 
As there are many inftances of mineral waters 
fpringing out of the earth very near each other, 
which at the fame time are impregnated with very 
different principles ; it therefore feemed not at all 
improbable, that as thefe waters did appear to run, 
for fome part of their courfe, in different channels, 
they might in fome refpedts be different from 
each other. And this fufpicion I found not to be 
altogether groundlefs with regard to thefe fprings, 
as will be fhewn afterwards. For which reafon it 
may be obferved, that the following trials were all 
made upon the water of the upper fountain, except 
where the other is particularly mentioned j and alfo 
that they were made within 24 hours after the water 
was taken from the fpring, being carried to Moffat 
in bottles carefully fealed. 
According 
