920 



INDEX. 



Campbell (A.) on the use of mutual 

 ioductometers, 497. 



Campbell (Dr. G. A.) on telephonic 

 intelligibility, 152. 



Campbell (N.) on the principles of 

 dynamics, 168 ; on the aether, 181. 



Carus-WUson (C.) on the pitting of 

 Hint-surfaces, 336. 



Chalmers (S. D.) on the sine con- 

 dition in relation to the coma of 

 optical systems, 356. 



Chapman (J. C.) on secondary homo- 

 o-eneous X radiation, 897. 



Chattock (Prof. A. P.) on the 

 pressure of the electric wind in 

 hydrogen containing traces of 

 oxygen, 449. 



Cloud method of determining the 

 ■elementary electrical charge, on a 

 new modification of the, 209. 



Clough (C. T.) on the cauldron sub- 

 sidence of Glen Coe, 334. 



Coherers, on, 869. 



Coil, on the effective resistance and 

 inductance of a helical. 77. 



Coma of optical systems, on the sine 

 conditions in relation to the, 356. 



Comets, on the size of the tail- 

 particles of, 626. 



Condenser, on the energy of a double- 

 layer, of electronic origin, 573. 



Conductivity, on a new method of 

 determining thermal, 587. 



Copper under combined stress, on, 

 116. 



Corpuscular radiation, on homo- 

 geneous, 337. 



Crystals, on the regularity of 

 structure of actual, 96. 



Dielectric capacitv, on the nature 

 of, 1. 



Dielectrics, on the polarization of, in 

 a steady field of force, 390. 



Disk resistance, on the variation of, 

 with temperature, in water, 513. 



Disturbancs, on the instantaneous 

 propagation of, in a dispersive 

 medium, 160. 



Double-layer condenser of electronic 

 origin, on the energy of a, 573. 



Dow "(J. S.) on the" physiological 

 principles underlying the flicker 

 photometer, 58. 



Ductile materials under combined 

 stress, on, 116. 



Dust, on the effect of, on the ioniza- 

 tion of air, 657. 



Dynamics, on the principles of, 168. 



Earth, on the bending of electric 

 waves round the, 276, 435, 757 ; 

 on the relative motion of the, and 

 aether, 809. 



Earth-air electric currents, on, 715. 



Earthquake-wave, on the velocity of 

 propagation of au, 576. 



Eccles (Dr. W. H.) on coherers, 869. 



Electric charge, on a new modifi- 

 cation of the cloud method of 

 measuring the elementary, and its 

 most probable value, 209. 



currents, on earth-air, 715. 



effect of the ultra-violet spec- 

 trum, on the, 290. 



field, on a theory of the struc- 

 ture of the, and its application 

 to llontgen radiation and light, 

 301. 



recording thermometers for 



clinical work, on, 538. 



resistance, on the change of, of 



metals in a magnetic field at dif- 

 ferent temperatures, 685. 



spark, on the constitution of 



the, 285. 



waves, on the bending of. round 



the earth, 276, 435, 757 ; rourd a 

 large sphere, on the, 516. 



wind, on the pressure of the, in 



hydrogen, 449. 



Electricity, on rays of positive, 424. 



Electrons, on spontaneous generation 

 of, in an elastic solid aether, 129 ; 

 on the charge of, 438. 



Electroscopic measurements, on vari- 

 ations observed in, and their pre- 

 vention, 278. 



Electrostatic effect of a changing 

 magnetic field, on the, 461. 



Elsden (J. V.) on the geology of the 

 neighbourhood of Seaford, 333. 



Eve (Dr. A. S.) on the effect of dust 

 and smoke on the ionization of air, 

 657. 



Eearnsides (W. G.) on the Howeill 

 fells, 447. 



Finlayson (A. M.) on the nephrite 

 and magnesian rocks of Xew 

 Zealand. 2U7 : on the metailogenv 

 of the British Isles, 821. 



Fletcher (A. L.) on pleochroic halos, 

 630. 



Flicker photometer, on the physio- 

 logical principles underhins" the. 

 58. 



