112 
lavater’s 
As all thefe vifible alterations can be proved froni 
the animal lyltcm in living creatures, we proceed 
to mention the principal inftriiments employed in it. 
If, for a moment, with the mind’s eye, we trace 
the roof and ceiling of that ftiipendous piece of 
archite6fure, the head, w^e fliall find it molt regu- 
larly defigned and executed, with a folid, well- 
fupported partition-wall, or floor, upon which all 
the moveable parts of the face are fixed ; we then 
difcover in this curious work different avenues, which 
Nature has wifely left as channels of communica- 
tion between the inner centre, or vital parts, and 
the vifible front. Befide this wmnderful contriv- 
ance, a great number of mufcles are fixed to the 
bony, or crowm-work, with their moveable points 
doping towards the outward (kin or furface of the 
whole. Hence arifes a fudden change upon thd 
face, from varied motions of the eyes, brows, and 
every other part that is continually touched by 
thofe tender ftrings which communicate in fo many 
ways with the foft parts fufceptible of impreflions. 
Independently of thefe mufcular agents, is an 
incredible quantity of nerves, connected with the 
brain and the organs of the five fenfes already de- 
feribed 2 thefe have their intricate windings and 
turnings j being interfedted, and advancing for- 
ward, they contribute to the texture of the fkin. 
The veins and arteries have the fame circuitous 
route. All thefe parts are fixed together upon a 
fubftan- 
