﻿614 



INDEX. 



Leathern (Dr. J. G.) on the effect of 

 a long straight wire on electric 

 waves, 46. 



Lebour (Prof. G. A. L.) on a case of 

 unconformity and thrust in the 

 coal-measures of Northumberland, 

 170. 



Lehfeldt (Prof. R. A.) on the accele- 

 ration of gravity at Johannesburg, 

 479. 



Levin (Dr. M.) on the origin of the 

 /3 rays emitted by thorium and 

 actinium, 177. 



Light, on abnormal polarization and 

 colour of, scattered by small ab- 

 sorbing particles, 147; on chemical 

 and electrical changes induced by 

 ultraviolet, 397. 



Lightning, on some remarkable re- 

 sults of a discharge of, upon an 

 oak-tree, 62. 



Liquid films, on the disruptive vol- 

 tage of thin, 317. 



Lorenzo (Prof. G. de) on the eruption 

 of Vesuvius in April 1906, 173. 



Lyle (Prof. T.R.) on the propagation 

 of longitudinal waves of magnetic 

 flux along iron wires and rods, 

 433. 



Magnetic field, on the effect of 

 electrical oscillations of iron in a, 

 109. 



flux, on the propagation of 



longitudinal waves of, along iron 

 wires and rods, 433. 



rotation spectrum, on the, of 



iodine vapour. 329 ; of sodium 

 vapour, 499. 



Magnets, on the use of chilled cast 

 iron for permanent, 468. 



Malcolm (Dr. H. W.) on double re- 

 fraction in colloids produced by 

 electric endosmose, 548. 



Marr (Dr. J. E.) on the influence of 

 the geological structure of English 

 lakeland upon its present features, 

 95. _ 



Materials, on the strength and be- 

 haviour of ductile, under combined 

 stress, 533. 



Metals, on the molecular structure 

 of, 254 ; on tests of, in reverse 

 torsion, 426. 



Milner (S. It.) on the use of the 

 secohmmeter for the measurement 

 of combined resistances and capa- 

 cities, 297. 



Moisture condensed on glass surfaces, 

 on leakage currents in the, 336. 



Molecular constitution of aqueous 

 solutions, on the, 1. 



structure of metals, on the, 



254. 



Monochord, on simultaneous vibra- 

 tion-curves of string and air ob- 

 tained from a, 576. 



Moore (Prof. R. B.) on new methods 

 for separating uranium X from 

 uranium, 393. 



More (Prof. L. T.) ou the dielectric 

 strain along the lines of force, 

 268. 



Morrow (Dr. J.) on the lateral vi- 

 bration of bars, 233. 



Morton (Prof. W. B.) on the de- 

 flexions caused by a break in an 

 overhead wire carried on poles, 

 200. 



Moving-coil galvanometers, on the 

 theory of, 269. 



Oldham (R. D.) on the constitution 

 of the interior of the earth as 

 revealed by earthquakes, 165. 



Penzer (J.) on simultaneous vibra- 

 tion-curves of string and air ob- 

 tained from a monochord, 576. 



Photometrv, on colour phenomena 

 in, 120. 



Pjetursson (Dr. PI.) on the crag of 

 Iceland, 176. 



Polarization, on abnormal, and colour 

 of light scattered by small ab- 

 sorbing particles, 147. 



Potassium chlorate crystals, on the 

 interference colours of, 67. 



Potential, on the, required to main- 

 tain a current between parallel 

 plates in a gas at low pressures, 

 210. 



Preston (Dr. S. T.) on questions 

 connected with astronomical phy- 

 sics, 570. 



Prism, on the determination of the 

 optical constants of a crystal by 

 means of refraction through a, 29. 



Radiation, on the thermodynamical 

 theory of, 57, 498 ; on the dis- 

 tribution of the intensity of the, 

 from radioactive sources, 152. 



Radioactive matter in the earth and 

 the atmosphere, on the, 189. 



sources, on the distribution of 



the intensity of the radiation 

 from, 152. 



