Proceedings at the Meetings. 591 



5. The stresses in a thick hollow Cylinder subjected to internal 

 pressure. By L. B. Turner, B.A., King's College. (Communicated 

 by Professor Hopkinson.) 



6. The theory of the motion of a charged particle through a gas. 

 By Professor Sir J. J. Thomson. 



November 21nd, 1909. 



In the Botany School. 



The following were elected Fellows of the Society : 



S. Brodetsky, B.A., Trinity College. 



T. K. Shaw, B.A., Sidney Sussex College. 



The following Communications were made : 



1. Aldabra and neighbouring islands. (Illustrated with Lantern 

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



2. Western Indian Ocean. (Illustrated with Lantern slides.) 

 By Professor Stanley Gardiner. 



3. Notes on the Larger Cetacea. By D. G. Lillib, B.A., St John's 

 College. (Communicated by Mr A. E. Shipley.) 



4. The continuations of functions defined by generalised hyper- 

 geometric series. By G. N. Watson, B.A., Trinity College. 



5. On some general Properties of Mixed Solutions. By L, Vegard. 

 (Communicated by Professor Sir J. Larmor.) 



January 2ith, 1910. 



In the Optical Lecture Room. 



Dr Hobson, Vice-President, in the Chair. 



The following Communications were made : 



1. On the velocities of diffusion of solutions of rubidium and 

 caesium chlorides. By G. R. Mines, M.A., Sidney Sussex College. 



2. Experimental Investigation as to Dependence of the Weight 

 of a Body on its state of Electrification. By L. Southerns. (Com- 

 municated by Professor Sir J. J. Thomson.) 



3. Note on an Attempt to Detect a Difference in the Magnetic 

 Properties of the Two Kinds of Ions of Oxygen. By Miss D. B. 

 Pearson. (Communicated by Professor Sir J. J. Thomson.) 



