VI. The Specific Heats of Metals and the Relation of Specific Heat to Atomic 



Weight. Part III. By W. A. TILDEN, D.Sc., F.K.S., Professor of Chemistry 

 in the Royal College of Science, London page 139 



VII. An Enquiry into the Nature of the Relationship between Sun-spot Frequency 



and Terrestrial Magnetism. By C. CHKEE, Sc.D., LL.D., F.R.S. . . 151 



VIII. On Some Physical Constants of Saturated Solutions. By the EARL OF 

 BERKELEY. Communicated by F. H. NEVILLE, F.R.S. 189 



IX. The Third Elliptic Integral and the Ellipsotomic Problem. By A. G. GREEN - 



HILL, F. if.S 217 



X. On the Resistance and Electromotive Forces of the Electric Arc. By W. DUDDELL, 



Wh.Sc. Communicated by Professor W. E. AYRTON, F.R.S. .... 305 



XI. On the High-Temperature Standards of the National Physical Laboratory: an 



Account of a Comparison of Platinum Thermometers and Thermojunctions 

 with tlie (rax Thermometer. By J. A. HARKKR, D.Sc., Fellow of Owens 

 College, Manchester, Assistant at the National Physical Laboratory. 

 Communicated by I!, T. GLAZEBROOK, F.R.S., from the National Physical 

 Laboratory 343 



XII. Colours in Metal Classes and in Metallic Films. By J. C. MAXWELL GARNETT, 



B.A., Trinity College, Cambridge. Communicated by Professor J. LARMOR, 

 Sec.R.S. . ..." ' 385 



Index to Volume . 4i> 



