Of Regular Stones. P a if t III. 
The GREAT PITHD KNIT-BONE. This is not a 
fingle one, but a Clufter. They ftand together parallel, 
equal to the thick end of a Tobacco-Pipe-Stalk^ without 
exceeding fmooth, and of a yellowifti colour, fomewhat 
like that of the Plates in the Ludm Helmontijj hereafter de- 
fcribed. Filled with a very large Pith, anfwerable to that 
in an Eldern-Branch, hard and ftony, and of a'blewifti co- 
lour, like that of blew Marie. The fpaces between thefe- 
veral Cylinders, filTd up with another fort of Stone, of the 
colour of old Elm. The yellowifti Cylinders, being rub'd 
hard, or fcraped, hath a ftrong (linking fcent : but what 
Species to compare it too, doth not at prefent occur. They 
are prefently diffolved with Spirit of Nitre. 
ANOTHER CLUSTER like the former \ faving, that 
the Cylinders ftand togetherf without any, or with little, 
order : and that the brown and blewifli Stones are both 
mixed in Veins, and feveral of the Cylinders hollow. 
The EMPTY KNIT-BONE. This is neither folid, nor 
hath any Pith, but a Pipe- ? yet with a very fmall bore. 
Smooth both within and without. And tranfver/ly ftriated, 
as the Belemnites, hereafter defcrib'd. 
ANOTHER, fomewhat more hollow. This alfo is 
tranfver/ly ftriated, as the former 3 but without rough and 
of an Iron-colour. 
A THIRD, moft hollow 3 knobed without, and of an 
Alh-colour. 
Of thefe S tones jcc the Relation efpecially of Joh. Chryflo- 
W phorivs Beckrnannus, Phyfick Profenor at Frankfurt 5 (a) who 
.3 • 0 bf erveS) That they grow in a fandy, feldom or never in a 
claiy-Ground. Sometimes two mens depth 3 and with 
Branches fide- ways. Taperd, as in Plants 5 where thickeft, 
equal to an ordinary Arm 3 the fmall Branches, to ones little 
Finger. The Place where found is noted by a white fatty 
Sand, the reft yellowifti round about 3 and underneath a 
dark, moift, and fatty putrid fubftance, like rotten- Wood, 
running in Veins and is the Mother of the OfteocoUa. So 
that it feems to grow fomewhat after the manner of the En- 
trochus, or Stelechites above defcrib'd. Tis found moft in 
Saxony, and the Palatinate. 
This S tone, as is indicated by its Name, is highly efteemed 
for expediting the Coalition of broken Bones 5 5 j hereof 
being 
