.(^4> 
ks Water dilTolving Earthy matter car-? 
ricth the fame down to inclining places^ 
both on the furface, in the Cavities 
of the Earth i fo Fire difiipating all folid 
Bodies in its way» doth not only expel 
their lighter particles, but fometimes 
allb cafts out their heavieft weighty; 
whereby it comes to pafsjthat on the Sur¬ 
face of the Earth there are formed Preci¬ 
pices, and Channels; but in the Bowels 
thereof, fubterraneous paffages and Ca- 
yerns *, by the occafion of which , the 
J?eds of the Earth itiay change their fcite 
two Ways; 
The Firjl is, a violent fxcuflion of the 
^eds upwards, whether that be cauled by 
fudden acccnfion of under-ground Ex* 
halations, or by a forcible elifiof* of Air 
occa,lioned by other huge neighbouring 
ruines. This excuflion of ^eds is fol¬ 
low’d by a difperfion of the Earthy mat¬ 
ter, and by a breaking afurider the Stony 
matter into little ftones and rnbbifli. 
The other is, a fpontaneous falling 
down of the upper jPeds,when,the lower 
matter or foundation being with-drawn, 
the upper bodies havebegun to crack; 
whence, according to the variety of ca-* 
yities 
