390 Proceedings at the Meetings. 



January 2§th, 1906. 

 In the Cavendish Laboratory. 



Professor Thomson, Vice-President, in the Chair. 



The following was elected an Associate of the Society : 



Jan Hubrecht, Christ's College. 

 The following was elected a Fellow of the Society : 



L. Humphry, M.D., Trinity College. 



The following Communications were made : 



1. On the expansion of a gas into a vacuum and on the determi- 

 nation of the specific heat at constant pressure for gases. By G. F. C. 

 Searle, M.A., Peterhouse. 



2. On the action of Radium and other Salts on Gelatin. By 

 W. A. D. Rudge, M.A., St John's College. 



3. A novel instrument for illustrating the magnetic properties of 

 Iron. By A. H. Peake, M.A., St John's College. 



4. The Permeability of Iron in the colloidal state. By E. F. 

 Burton and P. Phillips. 



February 12th, 1906. 

 In the Botany School. 



Mr Francis Darwin in the Chair. 



The following were elected Fellows of the Society : 



Baron A. von Hiigel, M.A., Trinity College. 

 H. A. Webb, M.A., Trinity College. 



The following Communications were made : 



1. Notes on Cycads : with exhibition of a rare species acquired by 

 the Botanic Garden. By A. C. Seward, M.A., Emmanuel College. 



2. Respiration and Vitality. By F. F. Blackman, M.A., St John's 

 College. 



3. Hybridization of Barleys. By R. H. Biffen, M.A., Emmanuel 

 College. 



4. A comparison of the results from the Falmouth Declination 

 and Horizontal Force Magnetographs on quiet days in years of sun- 

 spot maximum and minimum. By C. Chree, Sc.D., King's College. 



