( 97 ) 
I have Iikewife difcover’d Tome Veflels running a- 
long within the Marrow- bone of the Shank of an Ox, 
that feem’d to be Blood* veflels. 
Since now it appears from our Obfervations, which 
have been made with great Diligence and Care upon 
Bones of all kinds, that the Bones do for the mod 
part confift of exceeding (mail Veflels, which Veflels 
ariie from the inner, hollow, or fpongy part of the 
Bone, and pafling thro’ the fuperficia! or cortical Sub* 
fiance, enter the Periofttum , and are from; thence con- 
tinued farther into the Body, yea even into the utmoft 
parts of the Body ; we may from hence reafonably 
conclude, that, in a healthful Body, as there is a con- 
flant (upply of an Oily Subfiance carried into the 
Bones, fo this is again conflantly carried out from the 
Bones by means of thefe VefTels, into all parts of the 
Body, even to the extremities of the Fingers. To 
give an evident proof of this, let any Man lay the 
ends of his fingers upon a clean and bright Pewter 
Plate, and he fhall find the Pewter appear foil’d in the 
place where he has touch’d it; for in reality this Soil 
is nothing elfe, but fome Oleaginous Particles difcharg’d 
from the ends of his Fingers. There is indeed fome- 
thing of a watery Subfiance mix’d with the Oily Par- 
ticles, but this evaporates in a little time, and leaves- 
the Oily Particles lying upon the Plate. 
III. Am 
