CONTENTS. 

 VOL. LXVI. 



No. 424. 



Page 



Anniversary Meeting, November 30, 1899 1 



Meeting of December 7, 1899, with List of Vice-Presidents 1 



List of Papers read .• 2 



On the Propagation of Earthquake Motion to Great Distances. By E. D. 

 Oldham, Geological Survey of India. Communicated by Sir Eobert S. 

 Ball, F.RS 2 



The Medusae of Millepora. By Sydney J. Hickson, F.RS 3 



Vapour-density of Bromine at High Temperatures. By E. P. Perman, 

 D.Sc, and G. A. S. Atkinson, B.Sc. Communicated by Professor 

 Eamsay, F.E.S 10 



Polytremacu and the Ancestry of the Helioporidse. By J. W. Gregory, 

 D.Sc. Communicated by Professor Lankester, F.E.S 19 



Gold-aluminium Alloys. By C. T. Hey cock, F.E.S., and F. H. Neville, 

 F.E.S 20 



On the Association of Attributes in Statistics, with Examples from the 

 Material of the Childhood Society, &c. By G. Uduy Yule, formerly 

 Assistant Professor of Applied Mathematics, University College, 

 London. Communicated by Karl Pearson, F.E.S 22 



Data for the Problem of Evolution in Man. III. — On the Magnitude 

 of certain Coefficients of Correlation in Man, &c. By Karl Pearson, 

 F.E.S., University College, London 23 



On the Numerical Computation of the Functions Go(.r), and 

 J»(^v 0- By Steadman Aldis, M.A. Communicated by Pro- 

 fessor J. J. Thomson, F.E.S 32 



No. 425. 



Meeting of December 14, 1899, and List of Papers read 44 



On the Origin of certain Unknown Lines in the Spectra of Stars of the 

 /3 Crucis Type, and on the Spectrum of Silicon. By Joseph Lunt, 

 B.Sc, F.I.C., Assistant, Eoyal Observatory, . Cape of Good Hope. 

 Communicated by David Gill, C.B,, F.E.S., Her Majesty's Astronomer 

 at the Cape _ 44 



