PROCEEDINGS 



OF THE 



ROYAL SOCIETY OF EDINBURGH. 



1843. No. 22. 



Monday, Q(h February 1843, 



Sir T. MAKDOUGAI.L BRISBANE, Bart., President, 



in the Chair. 



The following communications were read : — 



1. On the Law of Visible Position in Single and Binocular 

 Vision, and on the representation of Solid Figures by the 

 Union of dissimilar Plane Pictures on the Retina. By 

 Sir David Brewster, K.H., — concluded. 



This subject is treated under eight different heads : — 1. On the 

 law of visible direction in Monocular vision. 2. On the law of vi- 

 sible direction in Binocular vision. 3. On vision of objects of three 

 dimensions, by monocular vision ; by binocular vision. 4. On the 

 binocular vision of figures of different magnitudes. 5. On the cause 

 of the perception of objects in relief by the coalescence of dissimilar 

 pictures. 6. On the doctrine of corresponding points. 7. On the 

 vision of cameos and intaglios. 8. On the change in the apparent 

 position of the drawings of solid bodies. 



The general object of this paper is to establish the law of visible 

 direction, (position in monocular vision,) and to shew that it is equally 

 applicable to binocular vision, and affords a complete explanation 

 of various phenomena which had been considered incompatible with 



