IX 



No. 506. April 10, 1905. 



Page 



"ote on the Determination of the Volume Elasticity of Elastic Solids. 

 By 0. Chree, Sc.D., LL.D., F.R.S 518 



hi the Colouration of Glass by Natural Solai and other Radiations. 

 By Sir William Crookes, D.Sc., F.B.S 524 



On the Comparison of the Platinum Scale of Temperature with the 

 Normal Scale at Temperatures between 444 and -190 C., with 

 Notes on Constant Temperatures below the Melting-point of Ice. 

 By Morris W. Travers, D.Sc., F.R.S., and A. G. C. Gwyer, B.Sc 528 



le Arc Spectrum of Scandium and its Relation to Celestial Spectra. 

 By Sir Norman Lockyer, K.C.B., LL.D., ScD., F.R.S., and F. E. 

 Baxandall, A.R.C.Sc 538 



m the Stellar Line near X 4686. By Sir Norman Lockyer, K.C.B., 

 LL.D., Sc.D., F.R.S., and F. E. Baxandall, A.R.C.Sc. (Plate 13) .... 546 



Tote on the Spectrum of /JL Centauri. By Sir Norman Lockyer, K.C.B., 

 LL.D., Sc.D., F.R.S., and F. E. Baxandall, A.R.C.Sc 548 



Europium and its Ultra-violet Spectrum. By Sir William Crookes, 

 D.Sc., F.R.S 550 



a Relation between Autumnal Rainfall and the Yield of Wheat of 

 the Following Year. Preliminary Note. By W. N. Shaw, Sc.D., 

 F.R.S., Secretary of the Meteorological Council 552 



le Ascent of Water in Trees. By Alfred J. Ewart, D.Sc., Ph.D., 

 F.L.S., Lecturer on Botany in the University of Birmingham. 

 Communicated by Francis Darwin, For. Sec. R.S. (Abstract) 554 



urther Observations on Slip-Bands in Metallic Fractures Preliminary 

 Note. By Walter Rosenhain, B.A., B.C.E. Communicated by 

 Professor Ewing, F.R.S. (Plate 14) 557 



Conic Sizes in Relation to the Conductivity of Electrolytes. By W. R. 

 Bousneld, M.A., K.C., M.P. Communicated by Professor Larmor, 

 Sec, R.S. (Abstract) 563 



The Origin and Growth of Ripple-Mark. By Mrs. Hertha Ayrton. 

 Communicated by Professor W. E. Ayrton, F.R.S. (Abstract) 565 



The Role of Diffusion in the Catalysis of Hydrogen Peroxide by Colloidal 

 Platinum. By George Seuter, Ph.D., B.Sc. (Loud.), Lecturer on 

 Chemistry at St. Mary's Hospital Medical School. Communicated 

 by Sir William Ramsay, K.C.B., F.R.S 566 



Index 575 



