CONTENTS OF VOL. VI. — SIXTH SERIES. V 



rage 

 Dr. H. T. Barnes and Mr. D. Mcintosh on a New Form of 

 Phitinum Eesistance-Theruiouieter, speciiilly adapted for 



the Continuous-flow Calorimeter 350 



Mr. J. Kose-Innes on the Practical Attainment of the Thermo- 

 dynamic Scale of Temperature. — Part- II 353 



Prof. J. S. Towusend on Ionization produced by the Motion 



of Positive and Negative Ions 358 



Prof. E. Vi. Wood and Mr. J. H. Moore on the Pluorescence 

 and Absorption Spectra of Sodium Vapour. (Plates XIII. 



& XIV.) 362 



D.-. H. Garrett on the Viscosity and Composition uf some 



Colloidal Solutions 374 



Notices respecting New Books : — 



Prof. A. Eighi and B. Dessau's La Telegrafia Senza Pilo . . 378 

 Dr. E. A. Millikan's Mechanics, Molecular Physics, and 



Heat 379 



Dr. L. Spiegel's Der Stickstoff und seine Wichtigsten 



Verbindungen 379 



Dr. E. Ericke's Hauptsiitze der Differential und Integral 



Eechnung 380 



The late George Green's Mathematical Papers 380 



Mr. A. M. Worthington's Dynamics of Eotation 381 



Prof. O. D. Chwolson's Lehrbuch der Physik 381 



Proceedings of the Geological Society: — 



Prof. W. J. Sollas on the Figure of the Earth 382 



Mr. A. J. C. Molyneux on the Sedimentary Deposits of 

 Southern Ehodesia 383 



NUMBEE XXXIV.— OCTOBEE. 



Lord Eayleigh on the Work done by Forces Operative at one 

 or more Points of an Elastic Solid 385 



Messrs. K. Honda and S. Shimizu on Change of Length of 

 Ferromagnetic Substances under High and Low Tem- 

 peratures by Magnetization. (Plate XV.) 392 



Dr. C. Coleridge Farr on the Interpretation of Milne Seismo- 

 grams. (Plate XVI.) 401 



Mr. H. Lester Cooke on a Penetrating Eadiatiou from the 

 Earth's Surface 403 



Dr. James E. Ives on the Law of the Condenser in the 

 Induction-Coil. (Plate XVII.) 411 



Mr. J. Morrow on an Instrument for Measuring the Lateral 

 Contraction of Tie-bars, and on the Determination of 

 Poisson's Eatio 417 



Mr. S- E. Cook on the Distribution of Pressure around 

 Spheres in a Viscous Fluid. (Plate XVIII.) 424 



Lord Kelvin on Electro-ethereal Theory of the Velocity of 

 Light in Gases, Liquids, and Solids 437 



