CONTENTS OF VOL. XLIII. FIFTH SERIES. Vll 



Pnge 

 Proceedings of the Geological Society: — 



Miss Catherine A. Raisin on the Nature and Origin of 



the Eauenthal Serpentine 394 



Mr. W. P. D. Stebbing on Two Boulders of Granite from 



the Middle Chalk of Betchworth (Surrey) 395 



Mr. W. S. Gresley on Coal : a new Explanation of its 



Formation 395 



Mr. A. Gosling on Volcanic Activity in Central America 



in relation to British Earthquakes 395 



Mr. F. E C. Eeed on the Eed Eocks near Bonmahon on 



the Coast of Co. Waterford 396 



Mr. J. Logan Lobley on the Depth of the Source of Lava. 396 



NUMBEE CCLXV.— JUNE. 



Mr. William Beckit Burnie on the Thermo-electric Properties 



of some Liquid Metals 397 



Mr. J. H. Vincent on the Photography of Eipples. (Plates I.- 



III.) t . . . 411 



Drs. J. Carruthers Beattie and M. Smoluchowski de Smolan 

 on Conductance produced in Gases by Eontgen Eays, by 

 Ultra- Violet Light, and by Uranium, and some consequences 



thereof 418 



Dr. G. Gore on the Influence of Proximity of Substances upon 



Voltaic Action 440 



Mr. T. Preston on a Supposed Proof of a Theorem in Wave- 

 Motion 458 



Notices respecting New Books : — 



Mr. Wilder D. Bancroft's The Phase Eule 460 



Proceedings of the Geological Society : — 



Lieut.-Gen. McMahon and Capt. A. H. McMahon on 

 some Volcanic and other Eocks which occur near 



the Balnchistan-Afghan Frontier 461 



Dr. Henry Hicks on the Morte Slates and Associated 



Beds in North Devon and West Somerset. —Part II. . 463 

 Mr. T. Mel lard Eeade on the Glacio-Marine Drift of the 



Vale of Clwyd 463 



The Measurement of Electrolytic Conductivity, by F Neesen. 464 

 The Heats of Vaporization of Liquids, by S. E. Milner 464 



Index 465 





