590 Proceedings at the Meetings. 



The following Communications were made : 



1. Discussion of a difference equation relating to the tension of 

 overhead wires supported by equidistant poles. By A. A. Robb, M.A., 

 St John's College. 



2. Note on the abnormal pair of appendages in Lithobius. By 

 F. G. Sinclair, M.A., Trinity College. 



3. A Class on Integral Functions. By J. E. Littlewood, B.A., 

 Trinity College. 



4. On the Scattering of the /3-rays from Radium by Air. By 

 J. A. Crowther, M.A., St John's College. 



5. Note on the electrical behaviour of fluorescing iodine vapour. 

 By R. ¥/hiddington, B.A., St John's College. (Communicated by 

 Professor Sir J. J. Thomson.) 



6. On the reflection of sound at a paraboloid. By Rev. H. J. 

 Sharpe. 



7. On the emission of Rontgen rays from thin metallic sheets. 

 By G. W. C. Kaye, B.A., Trinity College. (Communicated by 

 Professor Sir J. J. Thomson.) 



8. The emission of positive rays from heated phosphorus com- 

 pounds. By F. HoRTON, M.A., St John's College. 



November 8th, 1909. 



In the Cavendish Laboratory. 



Professor Bateson, President, in the Chair. 

 The following was elected a Fellow of the Society : 



J. C. F. Fryer, B.A., Gonville and Caius College. 



The following Communications were made ; 



1. Discontinuities in Light Emission. By N. R. Campbell, M.A., 

 Trinity College. 



2. The Shape of Beams of Canal Rays. By J. A. Orange, B.A., 

 Trinity College. (Communicated by Professor Sir J. J. Thomson.) 



3. The determination of solutions of the equation of wave motion 

 which involve an arbitrary function of three variables which satisfies a 

 partial differential equation. By H. Bateman, M.A., Trinity College. 



4. On the Oscillations of Superposed Fluids. By H. J. Priestley. 

 (Communicated by Mr W. Welsh.) 



