508 
Of Regular Stones, Part III. 
the Angle of one, for the mod part, anfwers to the fide of 
another. Of a pale and femifperfpicuous colour, coming 
near to that of white Sugar-Candy. In which alfo (mail 
parallel Streaks of a brighter colour, are obfervable. Very 
(oft, as the former, and difioluble with Spirit of Nitre. 
The STYRIATED STALACTITES. Of the fame kind 
with the Styriafornm defcribed by Wormirn. It is a con¬ 
geries of ftrak, round Styria, fomcwhat parallel, and as 
thick as a Cherry-Stalk., or fmall Packthred. Each Styria 
is compofed of fmall, pointed and lofc Grains, as big as 
thofe of Salt, piled in a ftrait line one over another. It makes 
an Ejfervefcence with Spirit of Nitre. • 
The MOSSE-STALACTITES. Confiding alfo of Gra¬ 
nulated Styria 3 yet not ftrait and parallel, but winding 
too and fro, and the Grains with bigger points 5 fo as to re¬ 
ferable petrify’d Mojfe. 
I NEXT proceed to PLATED-STONES 3 and firft fucii 
as are of a Rhomboid Figure. 
A CRYSTAL of TALK. Wormirn defcribcs Talk , to 
be a Stone divifible into flat Plates , vanoufly 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, and figur’d 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 leifer, and two greater ones. Apiece 
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, fourlefler, 
and two greater ones 3 as if it were a perfect one, fplit. 
A piece of FOLIATED TALK. It confifteth of fcve- 
ral pieces, pellucid, cleveable, and fomething pliable, of a 
Rhomboid Figure, and compofed together fo as to refera¬ 
ble the indented leave of Wild Clary. 
A large Piece of TALK, above * a foot fquare. 
APiece of TALK taken out of the Ground in Wiltfbire. 
A 
