Proceedings at. the Meetings. 521 



February 29th, 1904. 



In the Optical Lectui'e Room. 



Dr Baker, President, in the Chair. 



The following were elected Fellows of the Society : 



R. P. Gregory, B.A., St John's College. 

 E. R. Burdon, B.A., Sidney Sussex College. 



The following Communications were made : 



1. On decomposition of Hydrogen Peroxide under the influence of 

 Radium Bromide. By H. J. H. Fenton, M.A., Christ's College. 



2. Exhibition of Oribatid Mites taken in the neighbourhood of 

 Cambridge. By C. Warburton, M.A., Christ's College, and N. D. F. 

 Pearce, M.A., Trinity College. 



3. Some observations on the determination of Sex in Plants. By 

 R. P. Gregory, B.A., St John's College. (Communicated by Mr W. 

 Bateson.) 



4. On Variation in the Number and Arrangement of the Male 

 genital Apertures, and on the Relative Proportion of the sexes, in the 

 Norway Lobster (Nephrops norvegicus). By D. C. McIntosh. (Com- 

 municated by Mr F. H. A. Marshall.) 



5. On the Boiling Points of Homologous Compounds. By H. 

 Ram age, B.A., St John's College. 



May 2nd, 1904. 



In the Optical Lecture Room. 



Dr Baker, President, in the Chair. 



The following Communications were made : 



1. Early Development of the Unfertilized Egg of the Sawfly, 

 JVematus ribesii. By L. Doncaster, M.A., King's College. 



2. Metallic " Passivitv " in relation to Time and Temperature. 

 By W. A. Hollis, M.D., Trinity College. 



3. 1. On Partial Fractions. 2. Note on plane imicursal curves. 

 3. On the order of certain systems of conditions. By A. C. Dixon, 

 Sc.D., Trinity College. 



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