1856.] General Monthly Meeting* 225 



ment has however already shown that the relation is not a simple 

 one. 



Many very interesting phenomena were observed in the course 

 of these investigations. When the gas is first exposed to the light 

 no action whatever is observed ; after a short time the absorption 

 slowly begins, and increases until a maximum has been attained, 

 after which it proceeds regularly. This phenomenon of induction 

 probably depends on a peculiar allotropic change which the 

 chlorine must undergo before it is capable of uniting with the 

 hydrogen. 



The speaker concluded by expressing his intention of continu- 

 ing these experiments at Heidelberg, in order exactly to determine 

 the relation which exists between the amount of action and the 

 volume of gas employed ; to investigate the phenomenon of induc- 

 tion ; and to obtain, if possible, an absolute measure for the chemical 

 rays. 



[H. E. R.] 



GENERAL MONTHLY MEETING, 



Monday, April 7. 



The Duke op Northumberland, K.G. F.R.S. President, 

 in the Chair. 



Hon. Sir Charles Crompton, Justice Q.B. 

 Montague Chambers, Esq. M.P. Q.C. 

 Charles Palmer, Esq. and 

 Thomas Wilson, Esq. 



w«re elected Members of the Royal Institution. 



F. B. Duppa, Esq. 



Graham M. M. Esmeade, Esq. 



Alexander Murray, Esq. 



Rev. Charles John Fynes Clinton, and 



F. P. B. Martin, Esq. 



were admitted Members of the Royal Institution. 



The following Presents were announced, and the thanks of the 

 Members returned for the same : — 



From 

 Arnold, Thomas James, Esq. Life Sub. R.I. — Reports of the Commission on 

 the Criminal Law. 1834-1845. fol. 

 The Law Amendment Journal, and Papers Nos. 1-3. Reports Nos. l',H8, 1856. 

 Letter to Lord Panmure on the Magistracy. Svo. 1856. 



q2 



