VI CONTENTS OF VOL. XLII. FIFTH SERIES. 



Page 

 Dr. H. Debus on the Genesis of Dalton's Atomic Theory . . 350 

 Notices respecting New Books : — 



Dr. P. Benjamin's ' The Intellectual Rise in Electricity — 



a History ' , 368 



Prof. E. W.. Brown's Introductory Treatise on the Lunar 



Theory 369 



Proceedings of the Geological Society : — 



Messrs. P. Lake and S. H. Reynolds on the Lingula- 

 Elags and Igneous Rocks of the Neighbourhood of 



Dolgelly 371 



Messrs. S. H. Reynolds and C. I. Gardiner on the Kil- 

 dare Inlier 372 



NUMBER CCLVIII.— NOVEMBER. 



Mr. "W. Sutherland on Thermal Transpiration and Radio- 

 meter Motion 373 



Prof. J. J. Thomson and Mr. E. Rutherford on the Passage 



of Electricity through Gases exposed to Rontgen Rays . . 392 

 Messrs. J. Erith and 0. Rodgers on the Resistance of the 



Electric Arc. (Plates III.-V.) 407 



Dr. G. Johnstone Stoney on Microscopic Vision 423 



Prof. W. E. Ayrton and Mr. T. Mather on Galvanometers. . 442 

 Notices respecting New Books : — 



Prof. H. Behrens's Anleitung zur mikrochemischen 

 Analvse der wichtigsten organischen Verbindungen. 



Vol. Ill 447 



Proceedings of the Geological Society : — 



Messrs. J. Home and E. Greenly on Foliated Granites 

 and their Relations to the Crystalline Schists in Eastern 



Sutherland 447 



Mr. E. Greenly on the Geology of the Eastern Corner 



of Anglesey 448 



M. E. de Montessus de Ballore on Seismic Phenomena 



in the British Empire 449 



Col. H. W. Eeilden on the Glacial Geology of Arctic 

 Europe and its Islands ; with an Appendix by Prof. T. 



G. Bonney 449 



Prof. J. P. Iddings on Extrusive and Intrusive Igneous 



Rocks as Products of Magmatic Differentiation 450 



Carbon Megohms for High Voltages, by W. M. Mordey .... 450 

 Search for Solar X-Rays on Pike's Peak, by Elorian Cajori . . 451 



