L 4 5 J 
parallel to, and in Contact with each other, begin- 
ning in the ~Encephalon and fpinal Marrow, and ter- 
minating in Mufcles, Membranes, Cutis , &c. for 
the Propagation of Motion and Senfation *. 
VIII. 
But bccaufe they have not been thought tubular 
by fome ingenious Men, it will be neceflary to give 
fome Reafons for our thinking them fo. If they 
are not Tubes, but folid Strings, there is no Way of 
accounting for the Beginning of mufcular Motion, 
but by their Vibration : Now nothing can be faid 
to vibrate that is not elaftic, and firft in a State of 
Tenfion ; but, from known Experiments, there is 
no Elafticity in the Nerves; nor can any Anatomift: 
fay lie ever found a Nerve in a State of Tenfion. 
IX. 
The Great Creator feems to have wifely 
avoided any Tenfion in a Nerve, for feveral proba- 
ble 
Altho’ I think it not the Bufinefs of this Le<Trure to touch upon 
Senfation, yet I am induced in this Place to make the following 
Reflection : If the Soul dwells, or exifts in every individual folid 
Part of the Body (which I am inclined to believe, rather than con- 
fine her to any one particular Place), fure flie may inftantly be ap- 
prifed of every Contatt producing the different Senfations, that can 
happen, wherefoever there is a nervous Expanfion ; without our 
being under a Neceffity (by placing her only in the Brain) of 
bringing to her Alfiftance an Undulation of animal Spirits to and 
from the Brain:, a Vibration of the Nerves; or, with fome Au- 
thors, contrary Motions of thofe animal Spirits in the fame Tube, 
fetving to Motion and Senfation ; all which are productive of many 
Abfurdities, which we have not Room here to enumerate. 
