( 7 ) 
bare in the Form of fmall fofr Papilly^ fromjthek 
Figure, called by Anatomijis Pyramid ales , on 
the Surface of the Cutis , covered over with the 
Cut i cula, where they act their Part in Senfmon, or 
Feeling, Tailing, and Smelling. The foft denudated 
Branches of the Optic Nerve which compofe the 
Retina , and what for the fame Reafon is called the 
Portio Mollis of the Auditory Nerve, the immedi- 
ate Intlruments of Seeing and Hearing, prove the 
fame. 
Again, it is the Extremities of the Nerves that 
enter with their Coverings into the Mufcle^ and into 
each Fibre of the Mufcle to which they belong ^ 
where they depofit their Contents, or aft their Part 
in mufcular Motion. 
But the Sides of the Nerves along their whole 
Trads, are infenfible or void of Feeling, becaufe 
their medullary Subfiance, and its Contents, which 
are the only immediate Inflrutnents of Senfation in 
them, are here covered with the Pia and Dura 
Mater , the laft of which is the ftrongeft, denfefl, and 
mod impenetrable Membrane of the whole Body, capa- 
ble of defending and conveying the tender medullary 
Subftance of the Nerves and its Contents, fafe, un^ 
hurt, and undiffipated to the feveral Organs of Sen- 
fation and Motion, at their Extremities the Seats of 
their Adion. 
A further Confirmation of this from Experience, 
is the Infenfibility of the Side of a large vifible 
Branch of a Nerve , which fometimes happens to lie 
bare and expofed in a Wound or Ulcer, where it will 
bear the Touch of the Probe without feeling,' and 
occafions no more Pain than in Wounds and Ulcers 
of 
