/ 33 °. ) 
invifible Fluid the Air, and of its feveral Qualities of 
Elafticity and Gravity, but what arifes from Experi- 
ments and Obfervations of its Elfefts ; which are fuf- 
ficientiy fatisfa&ory, and convince us of its Exiftence, 
though the minute Particles of its Compohaon fall 
under none of our Senfes. 
Therefore, in the fame manner, feeing thefe Ex- 
periments put the Elafticity and elaftick Vibrations of 
the Nerves quite out of the Queftion, I think we may 
as fairly conclude, that there is a Fiuid in the Nerves, 
though invifible ; as that there is fuch a Fluid called 
the Air, though it cannot be feen. 
I fhall only add, that though we may call this 
nervous Fluid by any Name, to which a proper, de- 
termined and fixed Idea is annexed, yet I 4:hink the 
Word ( Spirits ) was an unhappy Choice, as it* in- 
cludes an Idea either of fomething like to the Spirits 
of fermented Liquors, or fome of the faline volatile 
Spirits, as that of Hartf s-horn^ Sec. or a flying Va- 
pour or Exhalation, all which being loofe and inde- 
termined, have ferv'd only to miflead the Inquifitive, 
and amufe the Ignorant. 
But the Source from which this Fluid arifeth, to 
wit, the circulating Blood 5 the Veffels through which 
it is fecerned j and the Nerves in which it moves and 
is contained j the foft and almoft infipid Tafte, and 
no Smell obfervable in the Brain and Nerves, fuggefl: 
no Idea of fuch Spirits : And the Ample Qualities 
of a pure and perfectly defecated elementary Water, 
will better fuit all that our Senfes can difcover of it, and 
are indeed fufticient to folve all the Phoenomena of 
the Animal QEconomy, as far as they depend upon 
the Nerves : Which I hope to have an Opportunity of 
explain- 
