Proceedings at the Meetings. 381 



2. On Differential Equations with two Independent Variables. By 

 A. C. Dixon, Sc.D., Trinity College. 



3. On the calculation of the double integral expressing normal 

 correlation. By W. F. Sheppard, M.A., Trinity College. 



4. On the hemihedrism and twinning of Crystals of Dolomite 

 from the Binnenthal. By R. H. Solly, M.A., Downing College. 



5. Apparatus for measuring the extension of Wires. By G. F. C. 

 Searle, M.A., St Peter's College. 



6. Magnetic disturbances in the Isle of Skye. By Alfred Harker, 

 M.A., St John's College. 



February 19th, 1900. 



In the Physiological Lecture Room. 



Mr J. Larmor, President, in the Chair. 



The President announced that the Adjudicators of the Hopkins 

 Prize for the period 1891-1894 have awarded the Prize to W. D. 

 Niven, M.A., F.R.S., for his Memoir on Ellipsoidal Harmonics (Phil. 

 Trans., 1891) and his other valuable contributions to Applied Mathe- 

 matics. 



The following were elected Fellows of the Society : 



S. St Barbe Sladen, M.A., M.D., Caius College. 



R. H. Adie, M.A., Trinity College. 



T. J. I' A. Bromwich, M.A., St John's College. 



The following Communications were made : 



1. A suggestion as to a possible explanation of the origin of 

 some secondary sexual characters in animals as afforded by observa- 

 tions on certain Salmonids. By G. E. Barrett-Hamilton (communi- 

 cated by Professor Newton). 



2. Anthropological Notes. By W. L. H. Duckworth, M.A., Jesus 

 College. 



3. On the zoological position of Palaeosponclylus. By J. Graham 

 Kerr, M.A., Christ's College. 



