CONTENTS OF VOL. XXIV. FIFTH SERIES. V 



NUMBEE CXLVIIL— SEPTEMBEE. 



Page 

 Prof. C. Niven on some Methods of Determining and Com- 

 paring Coefficients of Self-induction and Mutual Induction 225 



Mr. E. C. Eimington's Note on Comparing Capacities 238 



Profs. W. E. Ayrton and J. Perry on Beams fixed at the Ends 245 



Sir J. Cockle on Binomial Biordinals 249 



Mr. H. Tomlinson on the Effect of Change of Temperature in 

 Twisting or Untwisting "Wires which have suffered Perma- 

 nent Torsion 253 



Mr. H. Tomlinson on the Eemarkable Effect on Eaising Iron 

 when under Temporary Stress or Permanent Strain to a 



Bright-red Heat 256 



Mr. E. T. Edgeworth on the Choice of Means 268 



Sir W. Thomson on the Stability of Motion. — Broad Eiver 



flowing clown an Inclined Plane Bed 272 



Prof. A. Gray on an Elementary Proof of certain Theorems 

 regarding the Steady Flow of Electricity in a Network of 



Conductors .' , 278 



Proceedings of the Geological Society : — 



Eev. A. W. Eowe on the Bocks of the Essex Drift 282 



Prof. J. Prestwich on the Date, Duration, and Conditions 

 of the Glacial Period with reference to the Antiquity 



of Man 284 



Messrs. A. J. Jukes-Brown and W. Hill on the Lower Part 

 of the Upper Cretaceous Series in West Suffolk and 



Norfolk 285 



Mr. B. Koto on some Occurrences of Piedmontite-schist 



in Japan 286 



Mr. O. A. Derby on Nepheline Bocks in Brazil, with 

 special Eeference to the Association of Phonolite and 



Eoyaite 287 



Miss C. A. Eaisin on the Metamorphic Eocks of South 



Devon 288 



Prof. T. M'Kenny Hughes on the Ancient Beach and 



Boulders near Braunton and Croyde in North Devon . . 289 

 Mr. W. S. Grresley on the Formation of Coal-seams, as 

 suggested by evidence collected chiefly in the Leicester- 

 shire and South -Derbyshire Coalfield 289 



Mr. J. V. Elsden on the Superficial Geology of the 



Southern Portion of the Wealden Area 290 



Mr. J. Spencer on Boulders found in Seams of Coal .... 291 

 On the Occurrence of Electromotive Forces in Metal Plates 

 which are traversed by a Current of Heat while placed in 

 the Magnetic Field, by A. von Ettingshausen and W. Nernst 291 

 On the Experiments made at the instance of the Electro- 

 Technical Union on Thunder-storms and Protection against 

 Lightning, by L. Weber 294 



