Proceedings at the Meetings. 177 



4. Are metals made radio-active by the influence of Radium 

 radiation 1 By Professor Bumstead. (Communicated by Professor 

 Thomson.) 



5. Some methods of increasing the Spark length of the Wimshurst 

 Machine. By B. J. Palmer. (Communicated by Professor Thomson.) 



February \3th, 1905. 



In the Optical Lecture Room. 



Professor Marshall Ward, President, in the Chair. 

 The following was elected a Fellow of the Society : 



K. Lucas, B.A., Trinity College. 

 The following Communications were made : 



1. Orthogonal and other special systems of Invariants. By 

 Major P. A. MacMahon. 



2. Reduction of generating functions by means of complex inte- 

 gration. By G. B. Mathews, M.A., St John's College. 



February 27th, 1905. 



In the University Chemical Laboratory. 



Mr F. H. Neville in the Chair. 



The following were elected Fellows of the Society : 



R. H. Biffen, M.A., Emmanuel College. 

 E. H. Hankin, M.A., St John's College. 



The following Communications were made : 



1. Soluble sodium dihydroxytartrate. By H. J. H. Fenton, 

 M.A., Christ's College. 



2. Studies on unsaturated Ketonic Compounds. By S. Ruhemann, 

 M.A., Gonville and Caius College. 



