Proceedings at the Meetings. 
319 
The following was elected a Fellow of the Society : 
Rev. A. Y. Yalentine-Richards, Christ’s College. 
The following were elected Associates of the Society : 
G. A. Carse, Emmanuel College. 
D. Comstock. 
The following Communications were made : 
1. On the procession of Gnethocampa pinivorax. By H. H. 
Brindley, M.A., St John’s College. 
2. A note on a Collection of Oribatidae from British Guiana. By 
C. Warburton, M.A., Christ’s College, and N. D. F. Pearce, M.A., 
Trinity College. 
3. The influence of spectral colours on the sporulation of various 
species of Saccharomyces. By J. E. Purvis, M.A., St John’s College, 
and G. R. Warwick, B.A., Pembroke College. 
November 12 th, 1906. 
In the Optical Lecture Room. 
Dr Hobson, President, in the Chair. 
The following was elected an Associate of the Society : 
L. T. More. 
The following Communications were made : 
1. On Electrification produced by heating salts. By Professor 
Thomson. 
2. On Secondary Rontgen rays. By Professor Thomson. 
3. On the specific heat of gases at constant volume and high 
pressure. By W. A. D. Rudge, M.A., St John’s College. 
4. The Radioactivity of the Alkali metals. By N. R. Campbell, 
M. A., Trinity College, and A. Wood, Emmanuel College. 
5. A relation between the ionic velocity and the volume of organic 
ions in aqueous solutions. By G. A. Carse, and T. H. Laby. (Com- 
municated by Professor Thomson.) 
