INDEX. 
Irving (Rev. A.) on the Bagshot 
strata from Aldershot to Woking- 
ham, 392. 
Judd (J. W.) on the Tertiary and 
older Peridotites of Scotland, 228. 
Jukes-Browne (A. J.) on the boulder- 
clays of Lincolnshire, 225. 
Klementic (Dr. I.) on the determi- 
natiou of the dielectric constant of 
some gases, 393. 
Konig (A.) on a new method of de- 
termining the constant of gravita- 
tion, 148. 
Lea (M. C.) on combinations of silver 
chloride, bromide, and iodide with 
colouring-matters, 229, 
Lendenfeld (R. von) on the glacial 
period in Australia, 512. 
Light, on the rotation of the plane of 
polarization of, by reflection from 
the pole of a magnet, 100; on the 
action of fog upon, 443. 
Line-divider, on the uses of a, 280. 
Liquid film, on the influence of an 
electric current in modifying the 
thinning of a, 94. 
Lodge (Prof. O. J.) on the seat of the 
electromotive forces in the voltaic 
cell, 153, 254, 3540; on thermo- 
electric current-direction, and on a 
point in thermodynamics, 448; on 
the identity of energy, 482; on the 
paths of electric energy in voltaic 
circuits, 487. 
Logical spectrum, on the, 286. 
M‘Connel (J.C.) on the use of Nicol’s 
prism, 317. 
Macfarlane (Dr. A.) on the logical 
spectrum, 286. 
Magnet, on the rotation of the plane 
of polarization of light by reflection 
from the pole of a, 100. 
Magnetism, on a new theory of, 73, 
333; contributions to the theory 
of, 237. 
Magnets, on permanent, 57. 
Malcolm (Col.) on binocular glasses 
for eyes of unequal focal lengths, 
461. 
Manometers with compressed air, 
results for use in calculations with, 
150. 
Marks (Miss Sarah) on the uses of a 
jine-divider, 280. 
Marsh-gas, on the employment of, for 
producing low temperatures, 65. 
523 
Metals, on the thermoelectricity of 
molten, 495. 
Monochord, on a new form of, 48. 
Morgan (Prof. C. L.) on the Clifton 
fault, 143. 
Morize (H.) on a selenium-actino- 
meter, 231. 
Nicol (Dr. W. W. J.) on supersatu- 
ration of salt-solutions, 458. 
Nicol’s prism, on the use of, 317. 
Oxygen, on the limit of the density 
of, 313. 
Pendulum, on the application of the, 
to the determination of the mean 
density of the earth, 219. 
Perry (J.) on gas-engine indicator- 
diagrams, 152; on the most econo- 
mical potential-difference to em- 
ploy with incandescent lamps, 304. 
Photography, on the application of, 
to electrical measurements, 513. 
Phyllotaxy, on elementary, 68. 
Poisson’s coefficient, on the value of, 
for caoutchouc, 66. 
Polarization, on the electromagnetic 
action of dielectric, 385. 
Polarizing-prism, on a new form of, 
69 
Potential-difference, on the most 
economical, to employ with incan- 
descent lamps, 304. 
Preston (S. T.) on some electromag- 
netic experiments, 131, 215. 
Pyrrol, on the synthesis of, from coal- 
gas, 232. 
Quadrant-electrometer, on the, 291. 
Rayleigh (Lord) on the theory of 
illumination in a fog, 448; on a 
monochromatic telescope, with ap- 
plication to photometry, 446. 
Reade (T. M.) on the drift-deposits 
of Colwyn Bay, 147; on boulders 
near Festiniog, 229. 
Reinold (Prof. A. W.) on the influ- 
ence of an electric current in modi- 
fying the rate of thinning of a 
liquid film, 94. 
Richarz (F.) on a new method of 
determining the constant of gravi- 
tation, 148. 
Rontgen (Prof. W. C.) on the elec- 
tromagnetic action of dielectric 
polarization, 385. 
Rucker (Prof. A. W.) on the influ- 
ence of an electric current in modi- 
fying the rate of thinning of a 
