PROCEEDINGS 



OF THB 



ROYAL SOCIETY OF EDINBURGH. 



1842-43. No. 21. 



Monday, bth December 1842. 



Sir T. MAKDOUGALL BRISBANE, Bart., President, 



in the Chair. 



The following communications were read : — 



1. On the Construction of a New Music Hall. By Sir George 



S. Mackenzie, Bart. 



The author noticed a variety of facts which were in direct opposi- 

 tion to the common notions entertained on the subject ; and which 

 led to the conclusion, that the chief object to be kept in view, was to 

 destroy all sound that did not go directly from the source of sound 

 to the ears of the audience, by preventing reflection. He described 

 the plan of the Hall now building at the Assembly Rooms, the form 

 of which is crucial, owing to the space on which it stands having been 

 limited, and the necessity for connecting it with the pre-existing 

 apartments ; and he stated that he would have preferred a square, 

 with the orchestra somewhat retired on one side. The new Hall waa 

 to be regarded as an experiment ; and if one mode for destroying 

 superfluous sound did not succeed, others would be tried. 



2. On the Geology of Roxburghshire. Part 1. By David 

 Milne, Esq. See Froceedings on 9ih January 1843. 



The following Donations of Books to the Society's Library^ 

 I were announced as having been received since the closing 

 [ Meeting of last Session. 



