[ 2 3 b 3 
the brain I mean, all the rnafs con¬ 
tained within the cranium), as well as in 
the medulla fpinalis or nerves. 
The brain in particular, at leaft in ani¬ 
mals, in which it forms an effential organ, 
ought to have an abundance of this fluid, 
as it is by means of this fluid, that it brings 
into play the fprings of genius, and that 
it exercifes its power and influence upon 
the different parts of the body. A want 
of this fluid ought to render a man lefs 
acute, flower, weaker, more flupid, and 
inactive. There are fome individuals 
who abound with it, and the imagination 
of fuch is fertile, its images beautiful 
and happy, and they are exquiflfe painters 
of characters, paflions, and of nature. 
Children who appear equally to abound 
With this Are, are very apt to difeover and 
mimic whatever they fee ridiculous in per- 
fon or behaviour. Thofe people who 
have mod vivacity (and this vivacity, cae- 
teris 
