﻿INDEX. 



845 



Dispersion, on the theory of, 465. 

 Drying-vessel, on a new form of 



sulphuric-acid, 609. 

 Dunlop (Dr. A.) on a raised beach on 

 the southern coast of Jersey, 

 207. 

 Earth's crust, on the average thorium 



content of the, 483. 

 Ehrenfest (Dr. P.) on a simplified 

 deduction of the formula which 

 Planck uses as the basis of his 

 radiation theory, 297. 

 Electricity, on irictional, on insula- 

 tors and metals, 261. 

 Electron, on the motion of the 

 Lorentz, 49. 



theory of metallic conduction, 



on the, 173, 425 ; of the optical 

 properties of metals, on the, 

 655. 

 Energy, on the law of partition of, 



383. 

 Equipotential surfaces, on self -inter- 

 secting, 832. 

 Evans (E. J.) on the spectra of 



helium and hydrogen, 284. 

 Ferguson (Dr. A.) on the boiling- 

 points and critical temperatures 

 of homologous compounds, 599. 

 Field of force, on motion in a periodic, 



15. 

 Fleck (A.) on the condensation of 

 radium and thorium emanations, 

 337. 

 Fluid, viscous, on the equations of 

 motion of a, 445 j on the two- 

 dimensional steady motion of a, 

 445 ; on the motion of a sphere in 

 a, 526. 

 Fluorescence, on light absorption 



and, 223. 

 Fokker (Dr. A. D.) on Einstein and 

 Gvossmann's theory of gravitation, 

 77. 

 Fraction, on the separation of a, into 



partial fractions, 63. 

 Frictional electricity on insulators 



and metals, on, 261. 

 Function, note on the expansion of 

 a, 65 ; note on the higher deriva- 

 tive of a, the variable of which 

 is a function of an independent 

 variable, 823. 

 Gamma rays, on the photographic 



action of, 836. 

 Gardiner (C. I.) on the Silurian to- 

 iler of Usk, 841. 



Gas molecules, on the scattering and 



regular reflexion of light by, 625. 



Gases, on the ideal refractivities of, 



28. 

 Geological Society, proceedings of 



the, 207, 842. 

 Glass plates, on a sensitive method 

 for examining optical qualities of, 

 613. 

 Gravitation, on Einstein and Gross- 



mann's theory of, 77. 

 Gyroscopic theory of atoms and 



molecules, on the, 310. 

 Harmonograph, on the duplex, 490. 

 Hartley (E. G. J.) on a new form 

 of sulphuric acid drying-vessel, 

 609. 

 Haselhurst (S. R.) on cone-in-cone 



structure, 843. 

 Helium, on the series spectrum of, 



284. 

 Hitchcock (Dr. F. L.) on the 

 operator v in combination with 

 homogeneous functions, 700. 

 Holmes (A.) on lead and the end 



product of thorium, 673. 

 Hopwood (F. LI.) on the plastic 

 bending of metals, 184 ; on a 

 qualitative method of investigat- 

 ing thermionic emission, 362. 

 Hot-wire anemometer, on measure- 

 ment of air velocity by the, 556. 

 Hydrogen, on the series spectrum of, 

 140, 284, 332, 651 ; on the line 

 spectra of, 709. 

 Hydrostatic pressure, on the varia- 

 tion of the triple-point with, 143. 

 Ikeuti (H.) on the tracks of the alpha 

 particles in photographic films, 

 420. 

 Illumination, on the brightness of 



intermittent, 646. 

 Induction, on the self and mutual, 



of coaxial coils, 578. 

 Induction-coil, on the most effective 



adjustment of an, 1. 

 Insulators, on frictional electricity 



on, 261. 

 Iodine vapour, on condensation nu- 

 clei produced by the action of 

 light on, 413. 

 Ionization of metals by cathode rays, 

 on the, 369 ; on, by positive rays. 

 783. 

 Ions, on the nature of the large, in 

 the air, 514 ; on a new type of, in 

 the air, 636. 



