592 POPULAR LECTURED \DDRESSES. 



vibrating plate, investigated experimentally by 

 Faraday; and the instability of a liquid in a glass 

 jar, vibrating up and down in a vertical line, demon- 

 strated mathematically by Lord RayleiV.1i. 



4. The instability of water in a prolate hollow 

 vessel, and its stability in an oblate hollow vessel, 

 each caused to rotate rapidly round its axis of 

 figure, 1 which were announced to Section A of the 

 British Association at its Glasgow meeting in 1876 

 as results of an investigation not then published, 

 and which has not been published up to the present 

 time. 



1 Nature, 1877, vol. 15, \\ 297, " On the 1'iecessionnl Motion of 

 a Liquid." 



