227 



The author concludes by observing, that the equations for the 

 transmission of an undulation along a musical string require a similar 

 correction to that introduced in the case of aerial vibrations. The 

 discussion of this branch of the subject he reserves for a future op- 

 portunity. 



May 6, 1858. 

 The LORD WROTTESLEY, President, in the Chair. 



In accordance with the Statutes, the Secretary read the following 

 list of Candidates recommended by the Council for Election into the 

 Society : 



Thomas Graham Balfour, M.D. 

 Edward Mounier Boxer, Captain 



R.A. 



Frederick Currey, Esq. 

 David Forbes, Esq. 

 Alfred Baring Garrod, M.D. 

 William Henry Harvey, M.D. 

 The Rev. Samuel Haughton. 



David Livingstone, LL.D. 

 John Lubbock, Esq. 

 Henry Darwin Rogers, LL.D. 

 William Scovell Savory, Esq., M.B. 

 Warington Wilkinson Smyth, Esq. 

 Lieut.-Col. Andrew Scott Waugh, 



B.E. 

 Thomas Williams, M.D. 



Henry Hennessy, Esq. 



The following communications were read : 



I. "On the Influence of Heated Terrestrial Surfaces in dis- 

 turbing the Atmosphere." By THOMAS HOPKINS, Esq. 

 Communicated by WILLIAM FAIRBAIRN, Esq. Received 

 April 13, 1858. 



(Abstract.) 



In this paper the author stated that the Hadleian theory of winds, 

 which is now the one generally recognized, is not supported by the 

 evidence of facts, but rests on assumptions founded on imaginary 

 effects of the partial expansion of the atmospheric gases by heat. It 

 is assumed in that theory, that when the tropical heat expands these 

 gases, they rise and flow away laterally in the higher regions towards 

 the poles, from which they return to the tropics in the lower regions. 

 But it was contended by the writer of the paper, that such heating 



