VI CONTENTS OF VOL. XUV. FIFTH SERIES. 



NUMBER CCLXIX.— OCTOBER. 



Page 



Prof. J. J. Thomson on Cathode Bays 293 



Mr. J. H. Vincent on the Construction of Models and 



Diagrams to Illustrate the Propagation of Light in Biaxals 317 

 Mr. Gr. E. C. Searle on the Steady Motion of an Electrified 



: Ellipsoid 329 



Prof. 1). B. Brace's Observations on Light Propagated in a 



Dielectric Normal to the Lines of Eorce 342 



Miss Helen G. Klaassen on the Change of Phase on Reflexion 



at the Surface of Highly-absorbing Media 349 



Lord Bayleigh on the Propagation of Waves along connected 



Systems of Similar Bodies 356 



Mr. E. J. Nanson on the Relations between the Coaxial 



Minors, of a Determinant 3:>2 



Notices respecting New Books : — ■ 



Dr. D. A. Murray's Introductory Course in Differential 

 Equations for Students in Classical and Engineering 



Colleges 367 



Dr. E. J. Bouth's Elementary part of a treatise on the 



Dynamics of a System of Rigid Bodies 3J7 



Proceedings of the Geological Society : — 



Mr. J. Parkinson on some Igneous Rocks in North 

 - Pembrokeshire 368 



NUMBER CCLXX.— NOVEMBER, 



Dr. N. Ernest Dorsey on the Surface-Tension of certain 

 Dilute Aqueous Solutions determine I by the Method of 



Ripples 369 



Mr. E. J. Nanson on Determinant Notation 396 



Mr. W. J. Humphreys on the Absorption of Rontgen 



Radiation 401 



Mr. Ervin S. Eerry on the Specific Inductive Capacity of 



Dielectrics in slowly and rapidly changing Electric Eields . 404 

 Mr. Charles E. Brush on the Measurement of Small Gaseous 



Pressures 415 



Mr. E. Butherford on the Velocity and Rate of Recombina- 

 tion of the Ions of Oases exposed to Rontgen Badiation . . 422 

 Notices respecting New Books :— 



Mr. W. C. Fisher's The Potentiometer and its Adjuncts. 440 

 Dr. A. H. Bucherer's Eine Kritik der Nernst'schen 



thermodynamischen Anschauungen 441 



Prof. Emil Cohn's Elektrische Striime , 441 



