. C ^3 3 
lent an Internall motion, as in the Parts of Jqua-Fortis, and 
yet we fee Water will not dilTolve Iron , as Aqua-Fcrtis does, 
and Common Bees- Wax is dijfturbed by neither of tiiem, I 
leave the Nice enquiry after this point to others, vizj What 
kind of Motion and peculiar Conformation of parts is requi- 
fite both in the Menftfmm and in the DifTolved Body, that a 
folution may refult f rom their Commixture. 
Some RefleS^iions on the foregoing Paper by Mr. T. M, 
What my Brother has laid dow^n in this Difcourfe, I think 
does moft undeniably evince that the received Law of Hy^ 
drojlaticks is fomewhat defe£tive. For Liquors, tho' they 
are Fluid yet they are Bodys, and therefore confift of parts 
united ; which Union tho' it be eafily deftroy'd, yet of ne- 
ceffity it requires fome degree of Force for the effefting it ; 
nor is it more manifeft, if rightly confidered, that a Flint re- 
quires Force for the feparation of it's parts> than that Fluids 
do for theirs. But however, I imagine, this Property ought 
not to be rely'd upon as the Ible Caule of this Appearance^ 
to which my Brother has apply 'd it ; nay perhaps does not 
fo much as concurr the leaft in the producing thiseffeO:; my 
Realbn in fhort is this ; whatever is of fufficient Power to 
raife the minute Particles of a Heavy Body in a light Fluid, 
is certainly a fufficient caufe to keep them in that ftate: now 
my Suppofition may give fome account of this, what my 
Brother lays, never can^for he mufl: neceffarily fuppoie them 
firfl: railed ; and then he gives the reafon of their not fink- 
ing : Whereas 'tis not to be queftioned but that that Force 
which raifed them, is the fame that keeps them from fall- 
ing to the bottom. 
But thefe Conjedures (fori efteeme them no more) I 
. leave to the Confideration of thole that defire to enquire 
further into this Matter. 
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