[ 227 1 
It is not neceffary to compofe a feparate 
article upon the mixed movements; but 
it will te fufficient for our purpofe to re¬ 
mark, that the mufcles defined for this 
office, have a mechanifm fimilar to that 
by which the voluntary motions are per¬ 
formed; and that they are likewife fubjedt 
to the influence of caufes both phyfical 
and moral, in like manner with all the 
other mufcles. 
Op the Sensations. 
The brain, the medulla fpinalis, and the 
nerves, are the inftruments of fenfation. 
The brain is the chef-d’oeuvre of the 
divine architect. It is here that we com¬ 
bine, imagine and create, and from hence 
emanated fo many works which have been 
ftamped with the feal of immortality. 
We have only very limited ideas as to 
the ftrudture of this prgan, and perhaps 
lhall never attain fuch a knowledge of its 
2 fabric. 
