4.80 _ Proceedings at the Meetings. 
The following Communications were made: 
1. On the dependence of the relative ionisation in various gases 
by f rays on their velocity, and its bearing on the ionisation produced | 
by y rays. By R. D. Kuzeman, B.A., Emmanuel College. 
2. Note on a Dynamical system illustrating Fluorescence. By 
N. P. McCretanp, M.A., Pembroke College. i 
November 17th, 1913. 
In the Comparative Anatomy Lecture Room. 
Dr SHIPLEY, PRESIDENT, IN THE CHAIR. | 
The following was elected an Associate of the Society : 
H. D. L. Minton, Jesus College. 
The following Communications were made : 
1. <A possible connexion between abnormal sex-limited trans: 
mission and sterility. By Dr Doncasrer, King’s College. 
2, The Flight of the House-fly. By E. Hinpre, B.A. (Com | 
municated by Mr C. Warburton.) | 
i 
| 
3. Sex proportions of Forficula auricularia in the Scilly Islands. 
By H. H. Brinpiey, M.A., St John’s College. 
November 24th, 1913. 
In the Cavendish Laboratory. 
Proressor NEWALL, IN THE CHAIR. 
The following were elected Fellows of the Society: _ 
S. Lees, M.A., St John’s College. 
D. G. Lillie, M.A., St John’s College. 
The following Communications were made: 
1. Distribution of Stars in relation to Spectral Type. By Pro- 
fessor A. S. EppineTon, Trinity College. 
2. (1) The comparison of nearly equal electrical resistances. 
(2) An experiment on the harmonic motion of a rigid body. 
By Dr G. F. C. Szarue, Peterhouse. 
