lOOKING-GLASS. 
Ill 
ESSAY XV. 
Anatomical Explanations of Changes pj^oduced by 
the PaJJions upon the Human Figure, i 
WE come now to explain the caufes of thofe 
fingular, various, and aflonifhing effefts, which are 
produced by motion and fentiments upon the hu- 
man figure, particularly the countenance. In this 
purfuit we muft co.nfider the fubje6f under the fol- 
lowing heads, viz. — 
1ft. The confiderable number of parts covered 
by the face. 
2d. Their different direffions, firings, and bands. 
3d. Their peculiar movements. 
4th. The power of the refleftor, or glafs, that 
reprefents to our fight the ftate of the body - and 
mind. 
5th. The effeft of ficknefs upon the vifage, and 
how the paffions are there impreffed, without our 
knowledge and confent. 
6th. The degree of force with which the blood 
flows through the fmalleft tubes. 
7th. The vital fpirit poured by the nerves. 
8th. The harmony and diforder of fuch parts of 
the vifage as are a fixed obje6t of meditation to 
the thinking man. 
As 
