( 27^ ) 
uefs. Ivlany of the thick- jointed pieces have certain joints a 
thought broader, or a very litle flanding out at the Angles, and 
thereby the joints are diftinguilh't into certain Conjugations of 2, 
3, or more joints: And thefe Conjugations are very obfervablc 
in the thin-jointed ftones, and are marked out witha fett of Wyers; 
ofwhichbyand by. 
The thickeft piece, which hath yet come to my bands, is not 
above one inch and a half about, and thofe very rare too : From 
which fize to that of a final pin, I have all the intermediat propor»- 
ons; and thefe fo exceeding fmal pieces are as exaftly ftaped, as 
tbegreateft. Moft pieces, if not all, ofanyconfiderable length, 
are not ftraight, butvifibly bent and inclining. All the pieces of 
any fort are much of an equal thicknefs, or but litle tapering ; yet 
one of the ends, by reafon of a Top- joint, is vifibly the thick- 
eft. 
This Top joint hath 5 blunt Angles, and is not hatched or en- 
graven, orbut very faintly, on theoutfide. Every joint elfeof a 
piece ( fave the top- joint ) isan/V^^/i^, and deeply engraven on 
both fides alike ^ and will accordingly fcrve for a SeaL The mid- 
dle of each angle is hollow, and the edges of the angles are thick 
furrowed : The terminations of thefe hatchings are the indented 
futures, by which the joints are fet together 5 the ridges of one 
joint being alternately let into the furrows of the other next it. The 
Hatchings of the flat-fided pieces are in circular lines; but of the 
other two fpecies, they are ftraight lines, or near the matter. 
""In the very center of the 5 angles is a fmal hole, confpicuous in 
mod: joints. Note alfo, that in the middle of each joint, betwixt 
angle and angle ; in the very future, is another fuchlike fmal pin- 
hole very apparent, if the ftones be firft well fcoured» 
Befides all the former particulars, there may be obferv'd, in the 
deep-jointed pieces, juft under the top-joint, above defcribed, 
the Fefligia of certain Wyers rather than branches ; and fometimes 
2,3, or more of the joints of the Wyers yet adhering. Thefe Wy- 
ers are ever jfx^^ in number, viz. one in the middle or hollow part 
betwixt angle and angle. Again, in //'//^-jointed pieces there are 
ever Jive of thefe Wyers, or a fett of them inferted into every conju- 
gation of joints ; fo that it were fome reprefentation of the thing, 
to imagine theftalkof jifperula ox Eqmfetum, Alfolhavefeen, 
but that very rate ly, ( not in one piece amongftsoo, j a fett of 
Wyers 
