Proceedings at the Meetings 487 



Th.e following were elected Associates of the Society : 



J. Humpliries, Queens' College. 



A. C. G. Menzies, Christ's College. 



Miss Lorna M. Swain, Newnham College, 



The following Communications were made to the Society : 



1. A note on Vital Staining. By F. A. Potts, M.A., Trinity Hall. 



2. Preliminary note on the Superior Vena Cava of the Cat. By 

 W. F. Lanchester, M.A., King's College, and A. G. Thacker. 



3. Preliminary note on a cynipid hyperparasite of Aphides. By 

 Miss M. D. Haviland. (Communicated by Mr H. H. Brindley.) 



4. The Problem of Soaring Flight. By E. H. Hankin, Sc.D., 

 St John's College. (Communicated by Mr H. H. Brindley.) 



5. On the rotation of a non-spinning gyrostat. By Sir George 

 Greenhill. 



6. A method of testing Triode Vacuum Tubes. By E. V. Appleton, 

 M.A., St John's College. 



January 24, 1921. 

 In the Cavendish Laboratory. 



Professor Seward, President, in the Chair. 



The following were elected Fellows of the Society : 



E. D. Adrian, M.D., Trinity College. 

 A. Munro, M.A., Queens' College. 

 E. G. D. Murray, M.A., Christ's College. 

 H. W. C. Vines, M.B., Christ's College. 



The following were elected Associates of the Society : 



Miss M. Barker, Newnham College. 



J. Burtt-Davy. 



D. A. Keys, Corpus Christi College. 



The following Communications were made to the Society : 



1. (a) Experiments with Eotating Fluids. 



{h) Tides in the Bristol Channel. By G. I. Taylor, M.A., Trinity 

 College. 



2. The deterioration of fabric under the action of Light and its 

 physical explanation. By F. W. Aston, M.A., Trinity College. 



3. Note on Constant Volume Explosion Experiments. By S. Lees, 

 M.A., St John's College. 



4. On the function [x]. By Viggo Brun. (Communicated by 

 Professor G. H. Hardy.) 



