PROCEEDINGS 



OF THE 



dfemtrritrge iPnsopIjkal Stoxktg. 



October 27, 1884. 

 ANNUAL GENERAL MEETING. 



The following were elected officers and new members of the 

 Council for the ensuing year : — 



President : 

 Prof. Foster. 



Vice-Presidents : 

 Prof. Stokes, Lord Rayleigh, Prof. Liveing. 



Treasurer : 

 Mr J. W. Clark. 



Secretaries : 

 Mr Trotter, Mr Glazebrook, Mr Vines. 



New Members of Council : 

 Prof. Cayley, Prof. Macalister, Mr Glaisher. 



The following communications were made to the Society : 



(1) On the effect of moisture in modifying the refraction of 

 plane polarised light by glass. By R. T. Glazebrook, M.A. 



When plane polarised light is allowed to pass through a 

 wedge or plate of an isotropic transparent medium the relation 

 between the positions of the planes of polarisation in the incident 

 reflected and refracted beams are given by various theories. 

 Brewster, Seebeck, Jamin, Quincke, and others have attempted 

 the verification of these formulae by experiment and the two 



VOL. v. pt. in. 12 



