[ 245 3 
fufficiently manifeft, as in the feventh and 
fifth pair (V. Haller, Prim. Len. Phyf. 
cum notis Prof. Wrifberg ) we mud con- 
fider nerves as an aflemblage of parallel 
fibres. 
Thefe threads or fibres are fo many elec- 
trophori. The electricity of each is excited 
apart, and each apart impreffesa ftroke upon 
the brain, which is proportioned to the im- 
pulfion they receive, and to the excitement 
of their electrical matter. In this way 
one excites numberlefs diftinCt imprefiions. 
Not only feveral imprefiions are made 
at the fame time upon, but they are ef¬ 
fected with a rapidity which belongs 
uniquely to the eleCtrical fluid. One may 
hear three or four founds in fucceflion very 
I, 
diftinCtly in the fpace of a quarter of a 
fecond. Between the time of touching a 
body, and the confcioufnefs of fuch a 
touching taking place, there is not any in¬ 
termediate fpace which can be calculated 
R 3 by 
