LOOKING-GLASS. 
115 
Since an uncommon flufli and fudden palenefs 
are infallible figns of oppofite agitations. Nature has 
wifely contrived to confine the tubes and veins of 
the face within a confiderable number of chains, 
for the purpofe of fixing inftantly upon the phyfiog- 
nomy a ftamp of the pafiions in characters, making 
a deeper impreffion with the hand of Time ^ fo 
that the principle of life (the blood) having tinged 
the furface, according to our varying affedtions and 
habits, their marks are never effaced ; nor is it then 
difficult for a judge of features to read at onee the 
lines in old men, fo as to know their profeffions 
and difpofitions. 
The complexion is likewife affefted by lefs live- 
ly fenfations, as when we bluffi from ffiame with- 
out our will, in a manner that muft be accounted 
for by confidering the fpot that difeovers the inter- 
nal fecret agitation producing fuch a change. 
The veins and arteries of the cheeks are connedl- 
ed with others in a chain of circulation, fupported 
by the upper and lower nerves, which aft and re- 
aft upon the whole mafs of blood j returning quick- 
ly through thofe channels, after having been kept 
back with the preffure accompanying the fentiment 
marked by bluffies j thus proceeding from every 
nerve that agitates our fenfes, more or lefs, accord- 
ing to circumftances and fituations. 
Befides, in the mufcular fibres of the arteries, 
there is a moving power — a centre, from which 
1 fyring 
