INDEX. 



'67 



Magnetic fields, on the action of uni- 

 form, on moving electrons, 721. 



Magnetization, on the change of 

 elasticity of ferromagnetic sub- 

 stances by, 36. 



Magnetizing forces, on the behaviour 

 of iron under small periodic, 232. 



Mercury, on a device for the recovery 

 of spilled, 656. 



Metals, on the selective absorption 

 of Rontgen rays in, 576; on the 

 influence of stress on the electric 

 conductivity of, 635 ; on the fatigue 

 of, subjected to Rontgen radiation, 

 708. 



Milner (Dr. S. R.) on surface con- 

 centration and the formation of 

 liquid films, 96. 



Monochord, on simultaneous vibra- 

 tions of string and bridge obtained 

 from a, 446. 



More (Dr. L. T.) on the appreciation 

 of difference of phase of sound- 

 waves, 452 ; on the fatigue of 

 metals subjected to Rontgen radi- 

 ation, 708. 



Nicholson (Dr. J. W.) on a general 

 solution of the electromagnetic 

 relations, 259. 



Nickel, on the change of elasticity 

 of, by magnetization, 43 ; on the 

 fatigue of. subjected to Rontgen 

 radiation, 708. 



Ocean, on the ionization of the atmo- 

 sphere over the, 248. 



Olszewski (Prof. K.) on the tempera- 

 ture of inversion of the Joule- 

 Kelvin effect, 722. 



Osmotic pressure, on, 552. 



Oxygen, chemical effects of the 

 electrical discharge in rarefied 

 hydrogen and, 289. 



Parkinson (J.) on the post-cretaceous 

 stratigraphy of S. Nigeria, 649 ; 

 on the geology of the Oban hills, 

 650; on the crystalline rocks of 

 the Kukuruku hills, 651. 



Patterson (W; H.) on the carbon 

 cell, 181. 



Pearson (Prof. K.) on the influence 

 of past experience on future ex- 

 pectation, 365. 



Penzer (J.) on simultaneous vibra- 

 tion-curves of string and bridge 

 obtained from a monochord, 446. 



Phase, on the appreciation of differ- 

 ence of, of sound-waves, 452. 



Phonic wheel and commutator, on a. 

 331. 



Phosphorescence, applications of the 

 theory of electrons to the theory 

 of, 622. 



Platinum wire, on the decomposition 

 of water-vapour in contact with, 

 630. 



Pleochroic halos, on, 381. 



Plug-cock fog-chamber, on the effici- 

 ency of the, 357. 



Porter (Prof. A. TV.) on the isopi- 

 estic temperatures of saturated 

 vapours, 724. 



Prescott (J.) on convective equili- 

 brium of a spherical mass of gas,. 

 459. 



Radiation, on, 189 ; on the thermo- 

 dynamical theory of, 285 ; on the, 

 from moving systems of electrons, 

 657. 



Radioactinisin, on, 165. 



Radioactive matter in the earth and 

 atmosphere, on the, 378. 



substances, on the velocity and 



energy of the a particles from, 110. 



Radioactivity of radium, on the, 313. 



Radium, on the radioactivity of, 

 313 : on the ionization of various 

 gases by the a particles of, 333. 



Radium clock, on experiments with 

 the, 747. 



Rayleigh (Lord) on our perception 

 of sound-direction, 214 ; acoustical 

 notes, 316. 



Residual charge in condensers, on the 

 rate of recovery of, 578. 



Resonator, on a multiple harmonic, 

 319. 



Reynolds (Prof. S. H.) on a Silurian 

 Inlier in the Eastern Mendips, 

 761. 



Rive (L. de la) on the introduction 

 of: Dopplers factor into the solu- 

 tion of the equations of the elec- 

 tron theory, 279. 



Rontgen rays, on a spectrum of the, 

 from a focus-tube, 576; on the 

 fatigue of metals subjected to, 

 708. 



Russ_(S.) on the rate of recovery of 

 residual charge in condenser*, 

 578. 



Russell (A.) on the magnetic field 

 and inductance coefficients of cir- 

 cular, cylindrical, and helical cur- 

 rents, 420. 



