[ i8 ] 
Senfibility, fenfations, and paflions, may exifl: 
without the brain, and have their feat in its meninges , 
and in the coats of the nerves formed by thofe me- 
ninges. If I had not endeavoured to prove that 
point in my phyfiology, and lately in my diflertation 
on the fenfibility of the dura and pi a mater , the 
cbfervations of children and animals born without 
brain, which are pretty confiderable in number, 
would demonftrate it by fadts. 
That thefe children are more lively, that is, 
more fenfible, I attribute to their having little 
of the nervous juice, though not lefs of the adtive 
fluid. This nervous juice I termed Jluide con- 
fervateur , the preferving fluid, in my phyfiology. 
It is long fince I have obferved that an abundance 
of this nervous juice produces the contrary of vi- 
vacity; and, as a confequence, of our principles, 
long fleep, or rigid continency for a length of time, 
renders U6 heavy and benummed, becaufe in each 
of thefe circumflances, this nervous juice abounds 
and regurgitates, if I may fo lpeak. 
But thele violent motions, whence have they their 
origin ? there mud be a nervous juice, to adt in the 
mufcles, and here we have very little. 
Neither of thefe animals was deprived of the 
medulla fpinalis, and one of them had a fmall por- 
tion of brain, or cerebellum. This is one fource of 
the nervous juice, and of the adtive fluid, necefiary 
to mufcular motion. This fource, I grant, is 
weak and poor, but I have made it appear in my trea- 
tife on this fubjedt, which obtained the prize from the 
Academy of Berlin, that there is in the blood a 
richer flore, which the nervous fluid unites to, and 
5 makes 
