[ +9 -3 
ble Reafons: i. The Origins of the Nerves in the 
Encephalon and fpinal Marrow are a mere Palp, very 
foft and tender, before they unite to form the Nerve, 
and very loofe in their Contexture; fo that a Veili- 
cation in any one, produced by Tenfton, would pull 
it out by the Roots, and would diforder the Parts 
of its Infertion too : 2. Suppofmg the Places of the 
Origin and Infertion of a Nerve to be firmly fixed, 
and in no Danger from Vellication, there could ftill 
be no Tenfion in the Nerve, becaufe no Nerve could 
be brought into right Lines ; the very Structure of 
the Parts, through which they pafs, would hinder it; 
for the Courfeofthe nervous Trunks of the Limbs, 
being along the Interfaces ofMnfeles, &c. if a Tenfion 
was produced in them, the Sides of the Mufcles, by 
which they run, would be preternaturally prefied, 
and become fo many Angles or Centres of that Vel- 
lication, to the great Detriment of their feveral 
Fundions : 3. If a Vellication was produced in the 
intercojlal Nerve or Ear vagum , which communi- 
cate with feveral of the principal Nerves in the Body, 
would there not be great Confufion brought about, 
in all the Parts to which fuch communicating Nerves 
lead ; and would not their proper Adions be much 
impeded ? 
From thefe and fuch-like Reafonings, we muft 
conclude the nervous Fibres to be Tubes, capable 
of tranfmitting fomething to the Parts into which 
they are inferred, from the Brain and fpinal Mar- 
row. 
\ 
H 
X, 
