[ 2 4 8 ] 
nerves, the greateft and moft furprizing 
we know of, is that of feeling. They 
alone feel. Every other part of the body 
is deftitute of this property. The nerves 
not only enjoy a fenfibility common to all 
of them, but each has befides a particular, 
diftindi, fpecific fenfe, which belongs to 
it alone. Moreover, they are fufceptible 
of afmoft innumerable impreilions and 
modifications, whence refult fo many difn 
ferent fenfations. 
Quorum ego nunc ftequeo caseas expo- 
nere caufas 
Nec reperire figurarum tot nomina quot funt 
Principiis, unde hsec oritur variantia rerum.” 
Luck ex. 
It is aftonithing with what facility this 
power of the nerves can be affected. Thefe 
affections may be reduced to two principal 
ones, viz.—To a diminution, or an aug¬ 
mentation of their energy. 
A per- 
