﻿VI CONTENTS OF VOL. XXXVIII. FIFTH SERIES. 



Page 

 Dr. G. Johnstone Stoney on the " Electron," or Atom of Elec- 

 tricity 418 



Proceedings of the Geological Society : — 



Prof. T. G. Bonney on Mesozoic Eocks and Crystalline 



Schists in the Lepontine Alps 421 



Lieut.-General McMahon on the Igneous Eocks of Dart- 

 moor 422 



Mr. T. V. Holmes on the Eelations of the Thames Valley 



Beds to the Boulder Clay 423 



Messrs. J. E. Leeson and G. B. Laffian on the Pleistocene 



Deposits of Twickenham 423 



A Study of Unipolar Induction, by Prof. Dr. Ernst Lecher. . 424 

 On the Circular Magnetization of Iron Wires, by Prof. Dr. 

 Iern. Klemencic 424 



NUMBEE CCXXXIV.— NOVEMBEE. 



Mr. Charles E. St. John on Wave-Lengths of Electricity on 



Iron Wires. (Plate XII.) 425 



Prof. John Trowbridge on the Change of Period of Electrical 



Waves on Iron Wires 441 



Prof. Eichard Threlfall on the Scattering of Light by Metallic 



Particles 446 



Mr. W. M. Hicks on the Self-induction and on the Gravity- 

 Potential of a Eing 456 



Prof. A. P. Chattock and Mr. F. B. Fawcett on the Energy 



of the Amperian Molecule 473 



Mr. F. L. O. Wadsworth on a New Method of Magnetizing 



and Astaticizing Galvanometer-Needles. (Plate XIII.) . . 482 

 Mr. J. B. Henderson on the Effects of Magnetic Fields on 

 the Electric Conductivity of Bismuth. (Plates XV. & 



XVI.) 488 



Notices respecting New Books : — 



Lieut.-Col. H. W. L. Hime's Outlines of Quaternions . . 499 

 Proceedings of the Geological Society : — 



Mr. Alfred Harker on the Carrock Fell Gabbro 501 



Messrs. A. M. Davies and J. W. Gregory on the Geology 



of Monte Chaberton 501 



Mr. W. S. Gresley on Cone in Cone, its Structure, 



Varieties, &c 502 



Captain H. G. Lyons on the Stratigraphy and Physio- 

 graphy of the Libyan Desert of Egypt 502 



Mr. D. Draper on the Geology of South Africa 503 



Mr. D. Draper on the Occurrence of Dolomite in South 



Africa 504 



Mr. J. W. Gregory on the Geology of British East 

 Africa , 504 



