INDEX. 



959 



Rossi (R.) on a relation between 

 the atomic volumes and the spectra 

 of elements, 922. 

 Rubens (Prof. II.) on polarization 

 of undiftracted long- -waved heat 

 rays by wire gratings, 822. 

 Rutherford (Prof. E.) on the pro- 

 duction of helium by radium, 

 586 ; on the transformation and 

 nomenclature of the radioactive 

 emanations, 621. 

 Sadler (Dr. C. A.) on the trans- 

 formation of the energy of homo- 

 geneous Rontgen radiation into 

 energy of corpuscular radiation, 

 447. 

 Salts, on the positive ionization from 



hot, 661). 

 Sangster (R. B.) on some conse- 

 quences of Fresnel's reflexion of 

 light theory, with formula? for 

 determining the angle of incidence 

 in order to reflect 1/wth the in- 

 cident light, 305. 

 Saturn's rings, on the origin of, 741 ; 



on the periodic times of, 949. 

 Shaw (A. N.) on increased accuracy 

 in the use of bifilar suspensions, 

 433. 

 Shell, on the stresses in a heavy 



spherical, 191. 

 Sherlock (R. L.) on the relationship 

 of the Permian to the Trias in 

 Nottinghamshire, 220. 

 Shorter (S. A.) on the application 

 of the theoiw of chemical potential 

 to the thermodynamical theory of 

 solutions, 933. 

 Snow (E. C.) on the probability 

 variations in distribution of a par- 

 ticles, 198. 

 Sodium, on the positive ionization 



from salts of, 669. 

 Solutions, on a dynamical theory of, 

 17 ; on the application of the 

 theory of chemical potential to 

 the thermodynamical theory of, 

 933. 

 Spectra, on the origin of, 214 ; on 

 the, of the fluorescent Rontgen 

 radiation, 396 ; on the resonance, 

 of iodine vapour and their de- 

 struction by gases of the helium 

 group, 469 ; on the, of the elec- 

 trodeless ring discharge in certain 

 gases, 720; on the separation of, 

 in compound gases, 727 ; on a 



relation between the atomic 

 volumes and the, of elements, 922. 

 Spheres, on the initial accelerated 

 motion of rigidly charged dielec- 

 tric, 1G9 ; on Stokes's law for the 

 motion of, through liquids, 755 : 

 on the motion of charged, 943. 

 Spherical shell, on the stresses in a 



heavy, 191. 

 Static charges, on lines of force due 



to given, 177. 

 Stead (G.) on the separation of 



spectra in compound gases, 727. 

 Stephenson (A.) on absorption and 



dispersion, 303. 

 Stokes's law for the motion of 



spheres through liquids, on, 755. 

 Stuhlmnnn (O.) on the difference in 

 the photoelectric effect caused by 

 incident and emergent light, 834. 



Suspensions, on bifilar, 433. 



Sutherland (W.) on weak electro- 

 lytes and towards a dynamical 

 theory of solutions, 17. 



Swann (Dr. W. F. G.) on the mag- 

 netic Held produced by a charged 

 condenser moving through space, 

 150; on the longitudinal and 

 transverse mass of an electron. 

 223. 



Temperature and molecular attrac- 

 tion, on the relation of, 84 ; on 

 a thermostat for controlling the, 

 of a room, 211. 



Tension and torsion, on a relation 

 between, 740. 



Thermostat for controlling the tem- 

 perature of a room, on a, 211. 



Thomas (II. II.) on the Skomer 

 volcanic series, 465. 



Todd (G. W.) on the mobility of 

 positive ions from heated alu- 

 mium phosphate in gases, 791. 



Tolman (Dr. R. C.) on non- 

 Newtonian mechanics, 458. 



Townsend (Prof. J. S.) on charges 

 on ions in gases, 204 ; on the mode 

 of conduction in gases, 656, 816. 



Transformation and nomenclature 

 of the radioactive emanations, on 

 the, 621. 



Trowbridge (Prof. A.) on groove- 

 form and energy distribution of 

 diffraction gratings, 534. 



Ultra-violet light, on the intensity 

 of the, emitted by an electrical 

 discharge at low pressures, 412. 



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