5 o8 Of Regular Stones. P a r t HI. 
-■ - - - |[| - t \ , T-T i — — «~T~— ~ - - •^ Bm *Tii~hi^ L fLLjui a ; - i ,| M iii 111 "•~~ Z — ii— aml^ii ■ i ~ 
the Angle of one, for the moft part, anfwers to the fide of 
another. Of a pale and femifperfpicuous colour, coming 
near to that of white Sugar-Candy. In which alfo fmall 
parallel Streaks of a brighter colour, are obfervable. Very 
foft, as the former, and diflbluble with Spirit of Nitre. 
The STYRIATED STALACTITES. Of the fame kind 
with the Styrideformis defcribed by Wormius. It is a con- 
geries of ftrait, round Styria, fomewhat parallel, and as 
thick as a Cherry-Stalk, or fmall Packthred. Each Styria 
is compofed of fmall, pointed and lofe Grains, as big as 
thofe of 5W*,piled in a ftrait line one over another. It makes 
an Efervefcence with Spirit of Nitre. 
The MOSSE-ST ALACTITES. Confifting alfo of Gra- 
nulated Styria 3 yet not ftrait and parallel, but winding 
too and fro, and the Grains with bigger points 3 fo as to re- 
femble petrify cl Mofe. 
I NEXT proceed to PLATED-STONES 3 and firft fiich 
as are of a Rhomboid Figure. 
A CRYSTAL of TALK. Wormius defcribes Tali, to 
be a Stone divifible into flat Plates, varioufly intricated, 
and divifible like Silver, which is all he faith of the form, 
and his words unintelligible. Far from a definition of that 
form, which, fo often, as its Concretion proceeds freely on 
all fides, or without hinderance from any adjacent Body, it 
doth obtain : being then, a Congeries of flat, and perfpi- 
cuous Plates, fomewhat pliable, andfigurd into a kind of 
double Rhomboid 3 or as it were two Squares, with un- 
equal Sides and Angles, clapt together, with the edges pro- 
duced, to diftinguilh them : fo, as to obtain twelve Angles, 
and ten Sides, fc. eight leffer, and two greater ones. A piece 
thus figur'd, I call A Cryftal of Talk. And of this the form 
is both Accumulative and Circumfcriptive : the difference 
betwixt which is fhewed in the beginning of this Chapter. 
An HALF-CRYSTAL, having only fix fides, four leffer, 
and two greater ones 3 as if it were a perfect one, fplit. 
A piece of FOLIATED TALK. It confifteth of feve- 
ral pieces, pellucid, cleveable, and fomething pliable, of a 
Rhomboid Figure, and compofed together fo as to refem- 
ble the indented leave of Wild Clary. 
A large Piece of TALK, above * a foot fquare. 
A Piece of TALK taken out of the Ground in Wiltjhire. 
A 
