542 



INDEX. 



Gratings, on a certain asymmetry in 

 Prof. Rowland's concave, 190 ; in 

 theory and practice, on, 397. 



Grating-spectra on gelatine, on the 

 interference-bands of, 471. 



Gravity, on the daily variations of, 

 314. 



Greenstones, on some schistose, from 

 the Pennine Alps, 149. 



Gresley (W. S.) on anthracite and 

 bituminous coal-beds, 465. 



Hall's phenomenon, explanation of, 

 151. 



Heat of vaporization of liquid hydro- 

 chloric acid, on the, 435. 



, on the disengagement of, when 



electrical vibrations are transmit- 

 ted through wires, 537. 



Helmholtz (Prof.) on colour-blind- 

 ness, 52. 



Heydweiller (Prof.) on Villari's 

 critical point in nickel, 469; on 

 the potential of electrical dis- 

 charge, 538. 



Hornblende, on a secondary develop- 

 ment of, in crystalline schists, 150. 



Hughes (R. E.) on water as a 

 catalyst, 531. 



Hull (Prof. E.) on the geology of 

 Arabia Petrsea and Palestine, 

 146. 



Hydrochloric acid, on the heat of 

 vaporization of liquid, 435. 



Hydrolysis in aqueous salt- solutions, 

 on, 365. 



Hygrometer, comparative experi- 

 ments with the dry- and wet- 

 bulb psychrometer and an im- 

 proved, 525. 



Interference-bands of grating-spectra 

 on gelatine, on the, 471. 



Iron rings split in a radial direction, 

 on the magnetization of, 392. 



Irving (Rev. A.) on the base of the 

 Keuper formation in Devon, 147. 



Judd (Prof. J. ~W.) on inclusions of 

 Tertiarv granite in the gabbro of 

 Skye, 464. 



Kinetic energy, on the distribution 

 of, among- Kelvin's doublets, 160. 



Klemencic (Dr. I.) on the disen- 

 gagement of heat occurring when 

 electrical vibrations are trans- 

 mitted through wires, 537. 



Lagrange's equations of motion, on, 



Lefevre (J.) on the attraction of two 

 plates separated by a dielectric, 78. 



Lehmann (H.) on the magnetization 

 of iron rings split in a radial 

 direction, 392. 



Light, on the diffusion of, 81 ; on 

 the action of, upon electrical dis- 

 charges, 151. 



Liquid, motion of a perforated solid 

 in, 358, 490. 



Lommel (E.) on a visible represen- 

 tation of the equipotential lines in 

 plates traversed by currents, 151. 



Ludeking (C.) on the specific heat of 

 liquid ammonia, 393. 



Luminous discharges in electrodeless 

 vacuum-tubes, on, 506. 



MacGregor (Prof. J. G.) on oontact- 

 action and the conservation of 

 energy, 134. 



Madsen"(V.) on Scandinavian boul- 

 ders at Cromer, 312. 



Magnetic field of a circular current, 

 on the, 354. 



fields, constant and varying, 



experiments in, 68. 



Magnetization of iron rings split 

 in a radial direction, on the, 392. 



, on electrochemical effects due 



to, 473. 



Mascart (M.) on the daily variations 

 of gravity, 314. 



Melting-points of compounds, on the 

 effect of the replacement of oxy- 

 gen by sulphur on the, 458. 



Meteoric stone seen to fall in South 

 Dakota, on a, 152. 



Michigan, on the geology of the iron, 

 gold, and copper districts of, 74. 



Minchin (Prof. G. M.) on the mag- 

 netic field of a circular current, 

 354. 



Moissan (H.) on the properties of 

 amorphous boron, 80 ; on a new 

 electrical furnace, 313. 



Molecular force, on the laws of, 211. 



refraction and dispersion, on 



some recent determinations of, 

 204. 



Monckton (II. W.) on the occurrence 

 of boulders and pebbles from the 

 Glacial Drift in gravels south of 

 the Thames, 468. 



Motion of a perforated solid in 

 liquid, on the, 338, 490. 



Mountain-sickness, remarks on, 47. 



