MOTION OF THE EYES IN PORTRAITS. 



191 



the general position of the face as much as is usual in 

 good portraits,' it is very difficult to determine their 

 direction, and they will appear to have different directions 

 to different persons. But what is very curious, Dr. 

 Wollaston has shown that the same pair of eyes may be 

 made to direct themselves either to or from the spectator 

 by the addition of other features in which the position of 

 the face is changed. Thus in Fig. 25, the pair of eyes are 

 Fig. 25. 



looking intently at the spectator, and the face has a cor- 

 responding direction ; but when we cover up the face in 

 Fig. 25 with the face in Fig. 26, which looks to the right, 

 the eyes change their direction, and look to the right also. 

 In like manner, eyes drawn originally to look a little to 

 the right or the left of the spectator may be made to look 

 directly at him by adding suitable features. 



The nose is obviously the principal feature which pro- 

 duces this change of direction, as it is more subject to 

 change of perspective than any of the other features ; but 

 Dr. Wollaston has shown, by a very accurate experiment, 

 that even a small portion of the nose introduced with the 

 features will carry the eyes along with it. He obtained 

 four exact copies of the same pair of eyes looking at the 



