INDEX. 



499 



Influence-machine, on a water-spray, 



42. 

 Insulators, on the electrical resistance 



of, at high temperature, 147. 

 Interference-bands, on achromatic, 

 77, 189. 



Iodine, on the molecular condition of 

 dissolved, 146. 



Iron, on the thermal effect due to re- 

 versals of magnetization in soft, 

 207. 



Jennings (A. V.) on the Northern 

 slopes of Cader Idris, 69. 



Kilroe (J. R.) on the origin of move- 

 ments in the earth's crust, 141. 



Kinetics of bodies in solution, on the, 

 145. 



Klatt (V.) on the phosphorescence of 

 copper, ma.nganese, and bismuth in 

 the sulphides of the alkaline earths, 

 428. 



Koller (Dr. H.) on the electrical re- 

 sistance of insulators at high tem- 

 perature, 147. 



Kristensen (K. S.) on Leidenfrost's 

 phenomenon, 220. 



Krug (A.) on the energy of thermal 

 radiation at a white heat, 352. 



Lees (0. H.) on the law of cooling 

 and its bearings on certain equa- 

 tions in the analytical theory of 

 heat, 429. 



Leidenfrost's phenomenon, on, 220. 



Lenard (P.) on the phosphorescence 

 of copper, bismuth, and manganese 

 in the sulphides of the alkaline 

 earths, 428. 



Light, on the reflexion and refrac- 

 tion of, at the surface of a crystal, 

 110; on the mechanical equivalent 

 of, 352. 



Lightning, on some photographs of, 

 92 ; on intermittent flashes of, 106 ; 

 on, and gunpowder magazines, 868. 



Lodge (Prof. 0. J.) on electric radia- 

 tion and its concentration by lenses, 

 48. 



Loeb (M.) on the molecular condi- 

 tion of dissolved iodine, 146. 



Luminosity, on the mechanics of, 

 149, 248, 376. 



Lyons (H. G.) on the Bagshot beds, 

 144. 



McConnel (J. C.) on diffraction- 

 colours, 272. 



Maclean (M.) on geometrical optics, 

 400. 



M'Mahon (Major-Gen.) on the rocks 

 of the Lizard district, 139. 



Magnetic effects produced by motion 

 in the electric field, on the, 1. 



Magnetism, on a possible geological 

 origin of terrestrial, 71. 



Magnetization, on the thermal effect 

 due to reversals of, in soft iron, 

 207. 



Manganese, on the phosphorescence 

 of, 428. 



Mentzner (M.) on steatite as a source 

 of electricity, 428. 



Metallic spectra, on, 73. 



Motion, on the magnetic effects pro- 

 duced by, in the electric field, 1 . 



Natterer (Dr.) on the passage of elec- 

 tricity through gases and vapours, 

 147/ 



Nernst (W.) on the kinetics of 

 bodies in solution, 145. 



Optics, on geometrical, 232, 400. 



Palladium, on the dependence of the 

 electromotive position of, on the 

 quantity of hydrogen it contains, 

 351. 



Pickering (S. U.) on the nature of 

 solutions, 148. 



Platinoid, on the thermoelectric 

 position of, 163. 



Platinum electrodes, on the polariza- 

 tion of, 495. 



Polarization, on the use of the bi- 

 quartz in determining the plane of, 

 134. 



Pollock (A.) on the Clark cell as a 

 source of small constant currents, 

 353 ; on the resistance of imper- 

 fectlv purified sulphur, 469. 



Prestwich (Prof. J.) on the Pebbly 

 Sands of Suffolk, 142. 



Quartz as an insulator, on, 14. 



Radiation, on electric, and its con- 

 centration by lenses, 48; on the 

 energy of thermal, at a white heat, 

 352. 



Rayleigh (Lord) on achromatic in- 

 terference-bands, 77, 189. 



Resistance, comparison of the mer- 

 cury unit with the B.A. unit of, 

 17 ; on the value of the B.A. unit 

 of, in absolute measure, 98; on 

 the measurement of high specific, 

 452. 

 Roberts (T.) on the Upper Jurassic 



clays of Lincolnshire, 140. 

 Rosa (E. B.) on the ratio of the elec- 



