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the bony Subftance, which are no other than the 
tranfverfe Se&ions of fmail Veflels ; and befides thefe, 
there are other Veflels running longways in the Bone. 
And we find juft the fame in thole tranfparent parts, 
that lie between the bony Particles, which are re- 
prelented thicker between B C D E $ than they ap- 
pear’d to me. 
It is my Opinion, that the ufe of thefe bony Particles 
is, to convey an Oleaginous Liquor into the Verio* 
fleum , and that from the perioficum it is carried by 
the intervention of the other Membranes into all parts 
of the Body, when in a healthful Condition. 
In another place, I {aw a great number of Veflels 
arifing from a greater depth within the bone, which 
drew clofer together, fo as to compofe fmail Fafciculi , 
before they entred the Perioftcnm, in which they fe- 
parated one from another, and difpers’d them felves 
again. It is difficult to determine, whether thefe 
Veflels bring any Liquor into the Bone, or carry it 
out; but 1 rather think they ferve to carry it out 
of the Bone. 
Having placed another piece of Bone before the 
Microfcope, with the Pcriofleum adhering to it , I 
could difcover a great number of Veflels, that I had 
cut thro* lengthways, as they ran along the Periofteumt 
and others that were cut thro’ tranlverfly. and ap- 
pear’d as fo many Points, as is reprefented in Fig. 2 *- 
by K L 0 P N A, where the bony part is mark’d 
by the Letters K L M N A, in which, tho’ no Pores, or 
Veflels, are here reprefented, yet is it full of open- 
ings. That parr, which is defign’d by LO P M, 
we mult not take to be entirely membranous, for I 
am of opinion, that that part of it, which lies next 
the Bone, and which is reprefented by LAIN, is of a 
bony Subftance,, 
I had; 
