PROCEEDINGS OF 

 THE KOYAL SOCIETY. 



vol. lxx. No. 459. 



CONTENTS. 



PAGE 



A Comparative Study of the Spectra, Densities, and Melting Points of some 

 Grroups of Elements, and of the Relation of Properties to Atomic Mass. 

 By Hugh Ramage, B.A., A.R.C.Sc.I., St. John's College, Cambridge. 

 Communicated by Professor GL D. Liveing, F.R.S. (Plates 1,2) . . 1 



Experimental Researches on Drawn Steel. — Part I. Magnetism and its Changes 

 ■with Temperature. — Part II. Resistivity, Elasticity, and Density, and the 

 Temperature Coefficients of Resistivity and Elasticity. By J. Reginald 

 Ashwoeth. Communicated by Professor Schttstee, E.R.S. . . .27 



On the Spark Discharge from Metallic Poles in Water. By Sir Noeman 



Looeyee, K.C.B., F.R.S. (Plate 3) 31 



The Differential Equations of Fresnel's Polarisation-vector, with an Extension 

 to the Case of Active Media. By James Walkee, M.A. Communicated 

 by Professor Clieton, E.R.S 37 



On a Throw-testing Machine for Reversals of Mean Stress. By Osboene 

 Reynolds, E.R.S., and J. H. Smith, M.Sc, Whitworth Scholar, Victoria 

 University 44 



The Equilibrium of Rotating Liquid Cylinders. By J. H. Jeans, B.A., 

 Isaac Newton Student and Fellow of Trinity College, Cambridge. Com- 

 municated by Professor Gf. H. Daewin, F.R.S 4& 



Price Two Shillings. 



May 12, 1902. 



