CONTENTS OE VOL. XLVII. EOUKTH SERIES. Vll 



Page 

 Experimental Researches leading to a Determination of the 



Temperature of the Sun, by Father A. Secchi 394 



On Hydrogenized Palladium, by MM. L. Troost and P. Haute- 



feuille 397 



NUMBER CCCXIV.— JUNE. 



Mr. J. A. Fleming on the new Contact Theory of the Galvanic 



Cell 401 



Prof. Ketteler on the Boundary-Conditions of Reflection and 



Refraction for the Principal Section of Media in motion . . 411 

 Mr. T. T. P. B. Warren on a Method of finding Faults in In- 

 sulated Wires 416 



Lord Rayleigh on the Theory of Resonators 419 



Mr. 0. Heaviside on Telegraphic Signalling with Condensers. 426 



Mr. J. Croll on the Physical Cause of Ocean-currents 434 



Mr. J. W. L. Glaisher on the Verification^ of an Elliptic 



Transcendent Identity 437 



Prof. Cayley on the Mathematical Theory of Isomers 444 



Proceedings of the Royal Society : — 



Prof. J. Thomson on certain Relations between the 

 Gaseous, the Liquid, and the Solid States of Water- 

 Substance 447 



Proceedings of the Geological Society : — 



Prof. P. M. Duncan on the genus Palceocoryne, and its 



affinities 457 



Mr. J. R. Mortimer on Structure in the Chalk of the 



Yorkshire Wolds : 457 



Sir Philip de Malpas Grey-Egerton on Platysiagum scle- 



roc&phalum and Palceospinax priscus 458 



Dr. T. Wright on a new genus of Silurian Asteriadse . . 458 

 Mr. J. C. Ward on the Glaciation of the Northern part 



of the Lake-district 458 



Mr. F. Drew on the Alluvial and Lacustrine Deposits and 



Alluvial Records of the Upper Indus Basin 459 



Mr. W. T. Blanford on the Superficial Deposits in the 



Valleys and Deserts of Central Persia 461 



Prof. P. M. Duncan on Caryophyllia Bredai, from the 



Red Crag of Woodbridge 461 



Mr. J. Buckman on the Cephalopoda-bed and the Oolite 



Sands of Dorset and part of Somerset 461 



Mr. H. G. Seeley on Cetarthrosaurus Walkeri, an Ichthyo- 



saurian from the Cambridge Upper Greensand 462 



Some Experiments on the effects of Magnetism on the Electric 

 Discharge through a Rarefied Gas when it takes place in 



