STUDY X. *J 



As to the movements of the mufcles of the face, 

 it would be extremely difficult to defcribe them, 

 though I am fully perfuaded it might be poffible 

 to explain their Laws. Whoever fhall attempt 

 this, muft of neceffity refer them to the moral af- 

 fections. Thofe of joy are horizontal, as if the 

 foul, in the enjoyment of felicity, had a difpofuion 

 to extend itfelf. Thofe of chagrin are perpendi- 

 cular, as if, under the prefTure of calamity, the 

 mind was looking toward Heaven for refuge, or 

 feeking it in the bofom of the earth. Into fuch 

 an explanation of the Laws of mufcular motion 

 muft likev/ife enter, the alterations of colours, and 

 the contractions of forms, and in thefe, at lead, 

 we fhall difcover the truth of the principle which 

 we have laid down, that the expreffion of pleafure 

 is in the harmony of contraries, blending with 

 each other in colours, forms, and motions ; and 

 that the expreffion of pain confifts in the vio- 

 lence of their oppofitions. The eyes alone have 

 motions ineffable ; and it is remarkable, that, 

 under the influence of very ftrong emotions, they 

 are fuffufed with tears, and thus feem to have a 

 farther analogy with the orb of day, who, in the 

 ieafon of tempefts, fhrouds himfelf in rainy diftil- 

 lations. 



The principal organs of fenfe, four of which are 

 placed in the head, have particular contrafts, which 



b 4 detack 



