m 
of a tranfyeMy cliiTeded Trefe^ cr imi¬ 
tate the winditig flexures of Serpents, or 
run otherwife , infleded at ratidomei 
Nor is it to be wondred, that 
other ^nds oflneruftations appear, on 
the outer lurface, rough like commoB 
ftones, confidering that the exteriour fur- 
faee of the outer Plate exprelTeth the 
r'oughnefs of the Place. But in Torrents 
fuchkinds ofjncruftations are often found 
out of the place of their produdioBj big- 
caule by the rupture of the Beds the mat¬ 
ter of the place hath been thrown' here 
and there.;'■ ; ■ ' ■ - ' ;Iv/ 
Touching the <JU how from* ‘4 
Fluid the jjafticles of the Crufts, thttt 
are to be conjoyned to the Solid, are fe¬ 
vered, thefe particulars, at leaft, are eer^ 
"tain. 
1. -That Levity or Gravity hath no 
place there. 
2. That the faid particles are joyned 
to all forts of fuperficeS, becaufe that 
fmooth,rough,even and crooked fuperfi?* 
ees, and fuch as are made up out of di- 
, vers plains varioufly inclined, are found 
covered with crufts. 
3 - That the Motion of the Fluid is no 
impediment to them# Mean 
