Proceedings at ilie Meetings. 391 



February 26th, 1906. 

 In the University Chemical Laboratory. 



Mr F. H. Neville in the Chair. 

 The following Communications were made : 



1. An indicator for strong acids and bases. By H. J. H. Fenton, 

 Sc.D., Christ's College. 



2. (1) The action of acid chlorides of Acetylenic acids on Ketonic 

 compounds. 



(2) The Dihydrotetrazines. By S. Ruhemann, M.A., Gonville 

 and Caius College. 



3. The velocity of transformation of Sugars by alkalies. By R. S. 

 Morrell, M.A., Gonville and Caius College, and A. E. Bellars, B.A., 

 Magdalene College. 



4. The influence of very strong electro-magnetic fields on the spark 

 spectra of (a) vanadium, (b) platinum and iridium. By J. E. Purvis, 

 M.A., St John's College. 



March Uth, 1906. 



In the Cavendish Laboratory. 



Dr Fenton, Vice-President, in the Chair. 



The following were elected Fellows of the Society : 



H. Bateman, M.A., Trinity College. 



P. C. Gaul, M.A., Trinity Hall. 



W. S. Perrin, B.A., Gonville and Caius College. 



P. W. Wood, M.A., Emmanuel College. 



The following Communications were made : 



1. (1) A theory of the widening of lines in the spectrum. 



(2) On the reflexion and transmission of the radiation from 

 radio-active substances. By J. J. Thomson, M.A., Cavendish Professor 

 of Experimental Physics. 



2. (1) On the asymptotic expansion of the integral functions 



" x n T(l+an) . " x n T(l+n6) 

 n=0 r(l+w) n=0 V(l+u + nO) 



(2) On the asymptotic expansion of integral functions defined 

 by generalised hypergeometric series. By E. W. Barnes, M.A., 

 Trinity College. 



3. A method of following the course of certain chemical actions, 

 and a period of induction in the action of water on monochloracetic 

 acid. By P. V. Bkvan, M.A., Trinity College. 



4. The Radio-activity of Metals and their Salts. By N. R. Camp- 

 bell, M.A., Trinity College. 



26—2 



