762 
Kirkby (Rev. P. J.) on the electrical 
effects produced by the explosion of 
hydrogen and oxygen, 471. 
Kleeman (R.) on the ionization 
curves of radium, 726. 
Langley (Prof. 8. P.) on a possible 
variation of the solar radiation and 
its probable effect on terrestrial 
temperatures, 78. 
Laws (S. C.) on the magnetic sus- 
ceptibility of alloys of bismuth and 
tin, 49. 
Lead wire, on the stretching and 
torsion of, beyond the elastic limit, 
538. 
Lees (Dr. C. H.) on a graphical 
method of treating the impact of 
smooth elastic spheres, 215. 
Lorenzo (Prof. G. de) on the history 
of volcanic action in the Phle- 
orean Fields, 415. 
McClelland (Prof. J. A.) on the 
enetrating radium rays, 67. 
McClung (R. K.) on the rate of 
recombination of ions in gases, 
211; on the relative amount of 
ionization produced in gases by 
Réntgen rays of different types, 
357. 
Macdonald (H. M.) on the electrical 
vibrations associated with thin 
terminated conducting rods, 276. 
Magnetic field, on the force on a 
magnetic eH ina, 38. 
—— permeability of nickel and iron, 
on the variation with temperature 
of the, 179. 
susceptibility of alloys of bis- 
muth and tin, on the, 49. 
Magnetism, on the electric origin of 
terrestrial, 685. 
Magnetization of iron in bulk, on the, 
620. 
Magnetometers, on the determination 
of the horizontal component of the 
earth’s magnetic force with uni- 
filar, 118. 
Magnets, on the law of action be- 
tween, 115. 
Metals, on the hard and soft states 
in, 258. 
Michell (A. G. M.) on the limits of 
economy of material in- frame- 
structures, 589. 
Michelson (A. A.) on the relative 
motion of the earth and ether, 
716, ‘ 
INDEX. 
Miller (Prof. D. C.) on the Fitz- 
Gerald-Lorentz effect, 753. 
Molecular velocities, on the persist- 
ence of, 700. 
Molecules, on the determination of 
the size of, 692. 
Momentum in the electric field, on, 
Bis 
Morley (Prof. E. W.) on the Fitz- 
Gerald-Lorentz effect, 753. 
Morton (Prof. W. B.) on the vibra- 
tions of strings excited by pluck- 
ing and by resonance, 573. 
Narcosis, on the theory of, 704. 
Nernst filament, on the discharge of 
electricity from a, 230. 
Nickel, on the variation with tem- 
erature of the magnetic permea- 
ility of, 179. 
Nicol (J.) on the diffusion of hydro- 
gen through hot platinum, 1. 
Normal piling, on, 30. 
Optical wave-length, on new stan- 
dards of, 568. 
Organ-pipe problem, on the open, in 
two dimensions, 481. 
Orr (Prof. W. M°*F.) on Clausius’ 
theorem for irreversible cycles, and 
on the increase of entropy, 509. 
Osmosis, on the theory of, 704. 
Owen (G.) on the discharge of elec- 
tricity from a Nernst filament, 
230. 
Oxygen, on the electrical effects pro- 
duced by the explosion of hydrogen 
and, 471. 
Parnell (T.) on the diffusion of hy- 
drogen through hot platinum, 1. 
Particle, on the force on a magnetic, 
in a magnetic field, 38. 
Permeability, on the variation with 
temperature of the magnetic, of 
nickel and iron, 179. 
Petroleum, on a radioactive gas from 
crude, 498. 
Phillips (C. E. S.) on a new auto- 
matic gas-pump, 218, 
Piling, on normal, and the theory of 
the universe, 30. 
Platinum, on the diffusion of hydro- 
gen through hot, 1; on the effect 
of a luminous discharge on the 
ionization produced by hot, in 
gases, 400. 
Polonium, plan of a combination of 
atoms to haye the properties of, 
528, 
