[ r 4° ] 
fluid vehicle : and I believe, upon that account, will be 
more effectual for medicinal ules : for which reafon, 
I luppofe, thefe waters may prove a more beneficial 
medicine, than any others of the ferrugineous kind, 
whofe mineral contents are not fo intimately com- 
mixed with the aqueous fluid. 
As thefe waters are fo long in feparating their mi- 
neral contents, they appear particularly well adapted 
for being tranfported to diflant places : for by this 
quality they are fitted to undergo a long carriage, and 
to be kept a confiderable time, without any diminu- 
tion of their medicinal virtues. It muff aifo be no- 
ticed, that the water of the under well is by much 
the beft of the two for carriage, or for being long- 
kept, as it is longer in feparating its mineral contents 
than the upper one. 
From thefe experiments it is evident, that there 
is a confiderable difference betwixt the waters of the 
two fprings. The upper one contains a much larger 
quantity of the ochrous earth, and metalline cremor, 
than the under one ; which is the reafon, why it 
yields a deeper colour with galls, as may be obferved 
in the firft experiment. I fufpedted, on the other 
hand, that the under water contained a greater pro- 
portion of alum, than the water of the upper fpring ; 
but this I cannot affirm, as I find I had negledted to 
make the experiment, which would have determined 
whether it be fo or not. Tho’ the mineral contents 
of thefe two waters be fimilar, yet, if they be thus 
mixed in them in different proportions, this muff 
certainly create a difference between them, which 
deferves to be attended to, as it may be fufficient to 
difallow of their being ufed promifcuoufly, llnce their 
medicinal effefts may be thereby different. 
But 
