( 190 ) 



Proceedings of the Koyal Society of Edinburgh. 

 (Continued from Vol. XXXIV. p. 379.) 



Monday^ Qth Fehruary 1843. 



Sir T. MAKDOUGALL 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. 



2. Papers on Glaciers. No. 1, Account of a Geometrical Sur- 



vey of the Mer de Glace of Chamouni. By Professor 

 Forbes. 



Monday^ 2Qth February 1843. 



The Right Honourable Lord GREENOCK, Vice-President, 

 in the Chair. 



The following communications were read : — 



1. On the Anatomy of the Human Placenta. By John Good- 



sir, Esq. 



2. On the Mode in which Sound is produced and diffused, and 



on the Vibrations caused in the quality of Sound by sub- 

 stance and form. By Sir George S. Mackenzie, Bart. 



Monday, 27th February 1843. 



Dr ABERCROMBIE, Vice-President, in the Chair. 

 The following communication was read : — 

 Papers on Glaciers. No. 2, describing the Rate of Motion of 

 the Ice of the Mer de Glace, deduced from observation. 

 By Professor Forbes. 



Monday, Qth March 184 i'. 



The Right Honourable Lord GREENOCK, Vice-President, 

 in the Chair. 



