C 583 ] 
the known efFe<5lsof our Spa^ Waters : concerning the pat- 
ticulars^ fee alfo the Txeatife. 
This alfo being difpatcht ; the natures and properties of 
each Ingredient is propofed to be examined : And becaufe 
nothing is new therein, which the Antients have not well 
accounted for, but the growingSalts of the Niter of Lime- 
ftone, and abortive Vitriol, we inlift chiefly upon the exa- 
mination of theie two. . 
And affirm, as the perpetua! properties of them, that 
they two alone , of all the Minerals in Nature , every 
where petrify, as well as within our Bodies , as without 
us 3 and that it will be hard to find a third thing in na- 
ture that does fo. 
That Petrification is beft explained by Magnetifm : and 
that as Iron toucht v/ith a folution of blew Vitriol imme- 
diately attracts the Copper and firmly petrifies upon it ; ^ 
fo do the teeth of fome men (the only naturally naked 
bones of the bodyj attract the abovefaid petrifying juices 
contained in meats and drinks. But of this I purpofe to 
difcourfe ellewhere more at large. 
That thefe two Lapidifcent Juices of ihQ S paw Waters 
are the only efficient , and in good part the material 
Caufes too of the Stone in Man and other Animals ; crude 
humours , being occaftonally more or lefs implicated , 
as they more or lefs abound in bodies, and wrapped 
up in the coition of the Lapidefcent Juices ^ which thing 
Holly Wood does, well illuflrate 5 it being obferved above 
any fort of wood, moft inclined to petrifiGatioii becaufe 
of its abounding with a 'vifeom Humotir ^ which is the Bird- 
-lime in ufe. 
And becaufe it may be objecSted, that many are troubled 
with the lione,_ aod^bot few that drink of the S/:^?<?^^waters 5 
I-'anfwer; that in this fenfe, all waters are Spaws.: butmoch 
more fuch as are fo denominated : as ail the well waters of 
this Qity, ^nd England do teftifie, and therefore no man up- 
on this account is free from the Stones and whoever fliall 
U 2 attentively 
