I4A MicroGRAPHIA, 
beyond their natural tone, but are alfo prick’d, —— or corroded by. 
~ the pungent and incongruous poresof the intruded liquor. 911) 6 
And this feems to be the reafon, why Aqua fortis, and other faline lis 
quors, if they come to touch the fenfitive parts, as ina cut of the kin, 
or the like, do fo violently and intollerably exeruciate and torment the 
Patient. And ’tis not unlikely, but the Inventors of that Diabolical pra- 
étice of poifoning the points of Arrows and Ponyards, might receive 
| their firfthint from fome fuch Inftance in natural contrivances, as this of 
_ the Nettle: for the ground why fuch poifon'd weapons kill fo infallibly 
as they do, feems no other then this of our Nettle’s {tinging 5 for the Pon- 
yard or Dart makes:a paflage or entrance into the fenfitive or vital parts 
of the body, whereby the contagious fubftancecomes to be diflolv'dby, 
and mix’d with the fluid parts or humours of the body,and by that means 
- fpreads it felf by degrees into the whole liquid part of the body, in the 
manner, as a fee grains of Salt,put into a great quantity of Water, 
will by degrees diffufe it felf over the whole. d 
And thisI take to be the reafon of killingof Toads, Frogs, Effs, and 
feveral Fifhes, by ftrewing Salt on their backs (which Experiment was 
fhewn tothe Royal Society by a very ingenious Gentleman, anda worthy 
Member of it). tor thofe creatures having always a continual exfudation, 
as it were,of{limy and: watry parts,{weating out of the pores of their fkin, 
the faline particles, by that means obtain a wehicle;which conveysthemin- 
to the internal and vital parts of the body. B10 30 
This feemsalfo to be the reafon why bathinb in Mineral: waters are 
fuch foveraign remedies for multitudes of diftempers,efpecially chronical; 
for the liquid & warm vehicles of the Mineral particles,which are known 
to be in very confiderable quantities in thofe healing baths,by the body's 
long ftay in them, do by degrees fteep and infinuate themfelves into the 
pores and parts of the fkin,and thereby thofe Mineral particles have their 
waysand paflages open'd to penetrate into the inner parts, and mingle 
themfelves with the ffagnant juices of the feveral parts ; befides,many of 
thofe offenfive parts which were united with thofe ffagnant juices, and 
which were contrary to the natural conftitution of the parts, and fo be- 
come irkfome and painful] to the body,but could not be difcharged, be- 
caufe Nature had made no provifion for fuch accidental mifchiefs, are, by 
means of this foaking, and filling the pores of the fkin with a Jiquor, af 
forded a paflage through that liquor that fills the pores» into the ami: 
_ bient fluid, and thereby the body comes to be ee » ride anges 
_ So that ‘tis very evident,there may bea good as well as anevil:applica- 
, Hon of this Principle, And the ingeniovs Invention of that Excellent 
i pert, Dottor Wren, of inje€ting liquors into the veins of anAnimal; 
eems to be reducible to this head : I cannot ftay,nor is this a: fit place,to 
mention the feveral Experiments made of this kind by the moftincom* 
parable Mr. Boyle, the multitudes made by the lately mention’d Phyficiat 
Dotior Clark, the Hiftory whereof, as he has been pleas'd to commu 
nicate to the Koyal Society, fo he may perhaps be prevail’d withtomake — 
publique himfelf: ButI rather hint, that certainly, ifthis Principle 
: were 
