'28 



INDEX. 



Electrometer, on the theory of the 

 quadrant, 238. 



Eleotrostriction, on, 1. 



Entropy, on the variation of, 251. 



Ether, on the vapour-density of, 

 492. 



Everett (Prof. J. D.) on the mathe- 

 matics of bees' cells, 228. 



Farr (Dr. C. C.) on the interpreta- 

 tion of Milne seismograms, 401. 



Ferromagnetic substances, on change 

 of length of, by magnetization, 

 392. ° ' -^ ^ 



Filon (Dr. L. N. G.) on a new mode 

 of expressing solutions of Laplace's 

 equation in terms of operators in- 

 volving Bessel functions, 193. 



Fluid, on the distribution of pressure 

 around spheres in a, 424. 



Fluorescence of crystals under Ront- 

 gen rays, on the, 250 ; of sodium 

 vapour, on the, 362. 



Fog-signals, on the production of 

 sound in, 291. 



Fuchsin, on the anomalous disper- 

 sion and selective absorption of, 

 213. 



Functions, on the transfinite cardinal 

 numbers of aggregates of, 323. 



Galvanometer mirrors, on the con- 

 struction and attachment of thin, 

 188. 



Garrett (Dr. H.) on the viscosity and 

 composition of some colloidal so- 

 lutions, 374. 



Gases^ on the spectra of, at high 

 temperatures, 58; on the point- 

 discharge in mixtures of, 176; 

 on the theory of refraction in, 

 464 ; on the kinetic theorv of, 529, 

 720. 



Gelatine, on the viscosity and com- 

 position of solutions of, 375. 



Geological Society, proceedings of 

 the, 382, 54], 629, 724. 



Gill (E. L.) on the occurrence of 

 Keisley-limestone pebbles in Peel, 

 548. 



Grating, on the application of Cornu's 

 spiral to the diffraction-, 30 ; on 

 the aberration of the concave, 119; 

 on the effect of errors in ruling on 

 the appearance of a, 559. 



Harker (A.) on the overthrust Torri- 

 donian rocks of the Isle of Rum. 

 545. 



Harker (Dr. J. A.) on a direct- 

 reading potentiometer for thermo- 

 electric work, 41. 



Havelock (T H.) on the pressure of 

 radiation, 157. 



Hexane, on the vapour-density of, 

 492. 



Hilton (H.) on the graphical solution 

 of astronomical problems, 66. 



Home (H.) on a transported mass of 

 Aujpthill Clay, 635. 



Honda (K.) on change of length of 

 ferromagnetic- substances by mag- 

 netization, 392. 



Hutton (R. S.) on the effect of pres- 

 sure upon arc spectra, 569. 



Hydrogen, on condensation nuclei 

 produced in, by heating a platinum 

 wire, 306 ; on the genesis of ions 

 by the motion of positive ions in, 

 598. _ 



Induction-coil, on the law of the 

 condenser in the, 411. 



Initial acceleration in chemical 

 change, on, 271. 



Interference, on a curious case of, 

 561. 



Ion absorption and the earth's nega- 

 tive charge, on, 589. 



Ionization, on the positive, produced 

 by hot platinum in air, 80, 267 ; 

 on the theoiy of, by collision of 

 ions with neutral molecules, 116, 

 358 ; on the, in air at different 

 temperatures and pressures, 231. 



Ions, on the genesis of, by the motion 

 of positive ions through a gas, 

 598 ; on the rate of recombination 

 of, in air, 655. 



Iron, on change of length in, by 

 magnetization, 397 ; on the influ- 

 ence of stress and of temperature 

 on the magnetic change of resist- 

 ance in, 693. 



Ives (Dr. J. E.) on the law of the 

 condenser in the induction-coil, 

 411. 



Jeans (J. H.) on the vibrations set 

 up in molecules by collisions, 279 ; 

 on the kinetic theory of gases, 720. 



Joly (Dr. C. J.^ on a method of 

 establishing the principles of the 

 calculus of quaternions, 653. 



Jourdain (P. E. B.) on the trans- 

 finite cardinal numbers of aggre- 

 gates of functions, 323. 



