f havettow and then effay'd to find the patare of this Efficient, 
which works thefe figures in ftones: It fecm'd to me not very un- 
apt to explicate it according to the faying of HerAclitm ; Lux 
foca^amma fapiemiJJimA^ that is, where there is a flrong internal 
light to expand the Idea's, and a drought to terminate them^the 
vertue of a foul isftill prefent which imprints them in the mat* 
ter : Hence we find Nature is moft bufie in the kind where her 
intentions are highly raifed by the prefence of her chief princi- 
ples. Salts, Sulphurs, and Mercuries promoting her ferments^ 
which caufe fome internal light and drought, the IgnesfatiH be- 
ing only fbadowy refults from them: Thus we fee over and in 
bedsof Clays and Maries, which have ftroog ferments, being 
well impregnated with ^al ts, there often lie beds of Marchafites 
fall of luminous particles, and there we frequently find great 
numbers of Ldftdes Serfentariiy and Marchafites refembling 
Snakes ; and fo feverai other figar'd Stones,as the Eelemmfes, 
&c. In the joynts of the Lias-ftones^growmg over beds of Clay, 
we often meet with a great plenty of elegant Landskips. In 
Coal- mines, where the Sulphurs are ftrong, we find great lumps 
of very brightMarchafites,and great varieties of Herbs depifted, 
as is faid before. In Mines of Metals, where the Mercuries are 
generally predominant,rhere are landskips and reprefentations 
both of Land and Sea-animals,whereof fome carry a bulk^others 
are only fuperficially delineated. Thofe who endeavour co ex- 
plicate tbofe figurations mechanically, feem to have a harder 
task ; for^if they fay with Hippocrates, IJe Nat.JPueri 3 Sfiritu 
difienta omnU pro generis affinttate dijiant ; as though, when the 
Mineral fpirit had extended the marter,it fell into thofe figures 
tipon a fpontaneous reccfs according to its proper weight, 
which gives order and meafure to thing":: ; as he mechanically 
fhews by a Bladder, into which if earth, fand,and filings of Jead 
be pur,and water be added to them,and we give them motion by 
blowing in the Bladder througli a reed, firft chey aremixt toge- 
ther with the water, but in a while continuing in a gentle motion 
they feparate themfelves and retireeach to its like, the lead to 
the lead &c ; 1 fay, if it be explicated thus,vt feems difficult to 
conceive^ how the matter fliou'd come to have fucb a determi- 
nate weight to run into fuch figures^ without a fpecifical Reffor 
to intend and difpofc it, unlefs a general one be admitted , in 
whofe vertue all known and poffiblefpecies are,which, firfl: in- 
troducing 
