INDEX. 
Force, on physical lines of, 161, 281, 
338. 
Freund (M.) on butyryle, 501. 
Galvanic currents, on a standard mea- 
sure of resistance to, 25, 107. 
polarization of buried metal 
plates, on the, 377. 
Gaugain (M.) on the theory of cylin- 
drical conductors, 539. 
Geikie (A.) on the altered rocks of 
ae western and central Highlands, 
306. 
Geological Society, proceedings of 
the, 154, 233, 305, 536. 
Gilbert (Dr. J. H.) on the sources of 
the nitrogen of vegetation, 521. 
Glass tubes, on the fibrous arrange- 
ment of, 238. 
Glennie (J. S. S.) on the principles 
of the science of motion, 41; on 
principles of energetics, 274, 350. 
Glycerine, on some derivatives of, 
209. 
Glycolic acid, on the preparation of, 
360. 
Gore (G.) on ozone, 320. 
Govi (M.) on the polarization of light 
by diffusion, 157. 
Graphite, on the production of, by 
the decomposition of cyanogen 
compounds, 541. 
Gutta percha, on the msulating pro- 
perties of, 75. 
Hail, on the formation of, 543. 
Harkness (Prof. R.) on the geology 
of portions of the Highlands, 308. 
Heat, on a new proposition in the 
theory of, 241. 
Hector (Dr. J.) on the geology of 
the country between Lake Superior 
and the Pacifie Ocean, 537. 
Heintz (Dr.) on the preparation of 
glycolic acid, 360. — 
Helmholtz (M.) on the motion of the 
strings of a violin, 393. 
Hennessy (Prof.) on Clairault’s theo- 
rem, 396. 
Hirst (Dr. T. A.) on ripples, and their 
relation to the velocities of currents, 
1, 188. 
Hofmann (Dr.) on the action of ni- 
trous acid upon nitrophenylene- 
diamine, 457. 
Hopkins (W.) on the construction of 
Huanew calorimeter, 462. 
xley (Prof.) on a uew species of 
549 
Macrauchenia, 156; on Pteraspis 
dunensis, 303. 
Tron tubes, on the fibrous arrange- 
ment of, 238. 
Isoprene, on the properties and com- 
position of, 463. 
Jamieson (T. F.) on the geological 
structure of the South-west High- 
lands, 235. 
Jenkin (F.) on the insulating proper- 
ties of gutta percha, 75. 
Jerrard (G. B.) on quintics, 39, 348. 
Jolly (M.) on the specific gravity of 
liquid ammonia, 364. 
Kekulé (M.) on brominated deriva- 
tives of succinic acid, 124. 
Kirchhoff (Prof.) on the chemical ana- 
lysis of the solar atmosphere, 185 ; 
on a new proposition in the theory 
of heat, 241. 
Kirkby (J. W.) on the Permian rocks 
of the south of Yorkshire, 310. 
Kobell (Prof. F. von) on dianie acid, 
415. 
Kopp (Prof. H.) on the relation be- 
tween boiling-point and composi- 
tion in organic compounds, 227. 
Landolt (M.) on phosphuretted hy- 
drogen, 126, 
Lawes (J. B.) on the sources of the 
nitrogen of vegetation, 521. 
Lea (M. C.) on the optical properties 
of the picrate of manganese, 477. 
Leroux (M.) on the refractive indices 
ot genes at high temperatures, 
296, 
Light, on several phenomena con- 
nected with the polarization of, 
157, 438; on the determination of 
the direction of the vibrations of 
polarized, 321; on the nature of 
the, emitted by heated tourmaline, 
391; on the reflexion of, at the 
boundary of two isotropic trans- 
parent media, 481. 
Liquid expansion, on a law of, 401. 
Liquids, on the laws of absorption of, 
by porous substances, 57, 115; on 
certain laws relating to the boiling- 
points of different, 331; on the 
dispersion of different, by electrical 
action, 452. 
Lithium spectrum, note on the, 79. 
Loir (M.) on a new method of ob- 
taining solid carbonic acid, 495. 
Lowig (Prof.) on a new sulphur com- 
