534 



INDEX. 



Gneiss at Guttannen, on the so-called, 



138. 

 Gold-bearing rocks of the Southern 



Transvaal, on the, 135. 

 Gore (Dr. G.) on an apparent rela- 

 tion of electromotive force to 

 gravity, 307. 

 Graphic solution of dynamical prob- 

 lems, on, 443. 

 Gravity, on an apparent relation of 



electromotive force to, 307. 

 Griffiths (E. H.) on thp determina- 

 tion of low temperatures by plati- 

 num-thermometers, 515. 

 Guppy (R. J. L.) on the Tertiary 

 microzoic formations of Trinidad, 

 305. 

 Heat, on the absorption of radiant, 

 by alum, 141 ; on the mechanical 

 equivalent of, 142. 

 Heilborn (E.) on the physical signi- 

 ficance of b in Van der Waals' 

 equation, 459. 

 Hobson (B.) on the basalts and 



andesites of Devonshire, 385. 

 Holmes (J. V.) on railway-sections 

 between Upminster and Romford, 

 134. 

 Hughes (R. E.) on the action of 

 dried hydrochloric - acid gas on 

 Iceland spar, 117. 

 Human body, on the electrical re- 

 sistance of the, 218. 

 Hutchins (C. C.) on the absorption 



of radiant heat by alum, 141. 

 Hydrocarbons, on the illuminating- 

 power of,_ 120, 355. 

 Hydrochloric-acid gas, on the action 



of dried, on Iceland spar, 117. 

 Hydrogen, on the supposed detection 

 of the line-spectrum of, in the 

 oxyhydrogen flame, 371. 

 Iceland spar, on the action of dried 



hydrochloric-acid gas on, 117. 

 Interference bands of approximately 

 homogeneous light, on the, 

 407. 



methods, on the application of, 



to spectroscopic measurements, 

 280. 

 Inwards (R.) on an instrument for 



drawing parabolic curves, 57. 

 Ions, on the colour of, 457. 

 Irving (Rev. A.) on the 



beds of Bagshot Heath, 306/ 

 Jager (G.) on the dissociation of 



gases, 143; on the magnitude of 

 molecules, 220. 



Johnson Pasha (E. A.) on the geo- 

 logy of the Nile valley, 306. 



Kelvin (Lord) on graphic solution 

 of dynamical problems, 443. 



Lampa (A.) on the absorption of 

 light in turbid media, 144. 



Lea (M. C.) on the disruption of the 

 silver haloid molecule by mecha- 

 nical force, 46. 



Light, on the absorption of, in turbid 

 media, 144; on the intensity of, 

 reflected from water and mercury 

 at nearly perpendicular incidence, 

 309 ; on the interference bands of 

 approximately homogeneous, 407. 



Line- spectrum of hydrogen in the 

 oxyhydrogen flame, on Pliicker's 

 supposed detection of, 371. 



Liquid, on the instability of a cylin- 

 der of viscous, under capillary 

 force, 145. 



Liquids, on the heat of dissolution 

 of gases in, 35; on the dielectric 

 constant of conducting, 388 ; on 

 the boiling-points of different, at 

 equal pressures, 570. 



Lithophyses in the obsidian of 

 Lipari, on the, 138. 



Liveing (Prof.) on the spectrum of 

 liquid oxygen, and the refractive 

 indices of liquid oxygen, nitrous 

 oxide, and ethylene, 205 ; on 

 Pliicker's supposed detection of 

 the line-spectrum of hydrogen in 

 the oxyhydrogen flame, 371. 



Magnetic circuits, on joints in, 320. 



fields, on an instrument for 



measuring, 186. 



Magnetization, on the theory of, 



531. 

 Medium, on the influence of obstacles 

 arranged in rectangular order on 

 the properties of a, 481. 

 Mercury, on the intensity of light 

 reflected from, at nearly perpen- 

 dicular incidence, 318. 

 Metals, on the electrical resistance 

 of, at the boiling-point of oxygen, 

 326. 

 Michelson (A. A.) on the application 

 of interference methods to spec- 

 troscopic measurements, 280. 

 Miculescu (M. C.) on the mechanical 

 equivalent of heat, 142. 



