318 Messrs. E. F. Herromi and G. F. Yeo. [Jan. 21, 



January 14, 1892. 

 Mr. JOHN EVANS, D.C.L., LL.D., Treasurer, in the Chair. 



The Chairman announced the lamented death of H.R.H. the Duke 

 of Clarence and Avondale. 



The Fellows determined to adjourn the Meeting forthwith, and 

 directed the Secretaries to send, on behalf of the Society, addresses of 

 sympathy in their deep affliction to Her Majesty the Queen and 

 Their Royal Highnesses the Prince and Princess of Wales. 



January 21, 1892. 

 Sir WILLIAM THOMSON, D.C.L., LL.D., President, in the Chair. 



The Treasurer read a Letter which had been sent to him as Chair- 

 man of the preceding Meeting, expressing the warm thanks of the 

 Prince of Wales for the sympathy expressed by the Fellows of the 

 Royal Society in his affliction. 



The Treasurer offered the Congratulations of the Society to the 

 President on his elevation to the Peerage. 



A List of the Presents received was laid on the table, and thanks 

 ordered for them. 



The Right Hon. Farrer Herschell, Lord Herschell, whose certificate 

 had been suspended, as required by the Statutes, was balloted for 

 and elected a Fellow of the Society. 



The following Papers were read : 



1. " Note on the Audibility of single Sound Waves, and the 

 Number of Vibrations necessary to produce a Tone." By 

 E. F. HERROUN and GERALD F. YEO, F.R.S. Received 

 November 26, 1891. 



I. 



When investigating the sounds produced by skeletal muscle when 

 caused to contract at varying rates by electric stimulation, we were 



