C *: 8 ] 
Ganglions befides, inftead of being inftruments 
fubfervient to the will, are almoft peculiar to nerves, 
diftributed to parts, the motions of which are totally 
involuntary. And our author muft indeed have been 
greatly milled by his hypothecs not to obferve this 
linking circumftance. 
The theory, which prevailed in his time and coun- 
try, of the action of the dura mater upon the brain, 
now exploded, might lead this great man more en- 
tirely to believe an analogous mufcular power in 
Ganglions. But the brain needs no mufcular force 
to imprefs motion upon the animal fpiritsj and 
granting Ganglions to be, as is ingenioufly conjec- 
tured by Lancili and Window, fubfidiary brains, or 
analogous to the brain in their office, neither will 
they need any luch mufcular apparatus and force. 
A power, in fine, abfurd no lets than chimerical, as 
it fup poles the force of mufcles of the greateft ex- 
ertion and effed, to be derived from thofe of leaft 
bulk and ftrength (which muft be in fome propor- 
tion to the quantity of mufcular fibres) ; and would 
be a fingle inftance of a mechanical force producing 
another infinitely greater than itfelf. 
i. Ganglions are obferved to be formed generally 
upon nervous cords formed by the union of feverai 
different nerves. 2. They appear to abound with 
blood veffels. 3. The bulk of a Ganglion exceeds, 
for the moft part, that of all the nerves and vefiels, 
which it receives, and of which it may leem com- 
pofed (c). Hence we may not unreafonably conclude, 
(c) Gangliorum moles major eft quam fit aggregatum omnium 
vaforum ingredientium atquc egrcdientium ; quo fit, ut ad 
corum produdionem, neceflc fit concurrere, praeter comtnu- 
jiia vafa, peculiare aliud corpus, non tam ex cohasrcntia ct 
that 
