576 



INDEX. 



Richardson (S. S.) on magnetic 

 rotary dispersion in relation to 

 the electron theory, 232, 454. 



Rutherford (Sir E.) on long-range 

 alpha particles from thorium, 379. 



Schwatt (Prof. I. J.) on the sum- 

 mation of certain types of series, 

 75; on the partial fraction pro- 

 blem, 108, 560; on the expansion 

 of a function, 490. 



Series, methods for the summation 

 of certain types of, 75. 



Sheard (Prof. 0.) on the variation 

 of the positive emission currents 

 from hot platinum with the applied 

 potential difference, 497. 



Shorter (Dr. S. A.) on the consti- 

 tution of the surface layers of 

 liquids, 260. 



Sieghahn (Dr. M.) on the high- 

 frequency spectra of the elements 

 gold-uranium, 403. 



Silver crystals, on the structure of, 

 83. 



Smith (A. W.) on the Hall effect, 

 367. 



Sound, on the propagation of, in 

 narrow tubes of variable section, 

 89. 



Spectra, on the absorption, of the 

 vapours of inorganic salts, 55 ; on 

 the arc and spark, of nickel, 163 ; 

 on the high-frequency, of the ele- 

 ments gold-uranium, 403. 



Spheres, on the electrical capacity 

 of approximate, 177. 



Spinel group of crystals, on the 

 structure of the, 88. 



Springs, on the radioactivity of hot, 

 401. 



Steichen (Prof. A.) on the radio- 

 activity of the hot springs at 

 Tuwa,'401. 



Sulphur dioxide, on the infra-red 

 and ultra-violet absorption of, 

 505, 512. 



Summation of certain types of series, 

 methods for the, 75. 



Surface layers of liquids, on the con- 

 stitution of the, 260. 



Surface-tension, on the variation of, 

 with temperature, 37 ; on a method 

 of measuring, 143. 



Thallium, on the high-frequency 

 spectrum of, 403. 



Thermal conductivity, on the relation 

 between the, and the viscosity of 

 gases, 52. 



Thermionic currents, variation of, 

 with potentials, 549. 



Thin-plate beam, on the strength of 

 the, 348. 



Thompson (F. C.) on the electrical 

 and magnetic properties of pure 

 iron in relation to the crystal 

 size, 357. 



Thorium, on long-range alpha par- 

 ticles from, 379; on the high- 

 frequency spectrum of, 403. 



Travelling disturbance, on waves 

 due to a, 386, 539. 



Tryhorn (F. G.) on light absorption 

 and fluorescence, 417. 



Turbulent now, on the establishment 

 of, in pipes and channels, 322. 



Uranium, on the high-frequency 

 spectrum of, 403. 



Vacuum-tubes, on the absorption of 

 gases in, 478. 



Van der Waals' equation, on, 22. 



Vegard (Dr. L.) on the structure of 

 silver crystals, 83. 



Viscosity, on the relation between 

 the thermal conductivity and, of 

 gases, 52. 



Warren (S. IT.) on the late glacial 

 stage of the Lea valley, 413. 



Watson (Prof. G. N.) on the sum of 

 a series of cosecants, 111. 



Wave-length of the electrical vibra- 

 tion associated with a thin straight 

 terminated conductor, on the, 96. 



Wave-motion, on discontinuous, 47. 



Waves, on the propagation of, in 

 water, 1 ; on, due to a travelling 

 disturbance, 386, 539. 



Wellisch (Prof. E. M.) on free elec- 

 trons in gases, 186. 



Wilcockson (W. H.) on the granitic 

 rocks of the Lake District, 415. 



Wilson (Dr. W.) on the quantum of 

 action, 156. 



Winds, on the theory of the, 399. 



Wood (A. B.) on long-range alpha 

 particles from thorium, 379. 



X-rays, on the scattering of, and 

 atomic structure, 222 ; on expe- 

 riments to detect refraction of, 257. 



Zeeman patterns, on a notation for, 

 171. 



END OF THE THIRTY-FIRST VOLUME. 



Printed by Taylor and Francis, "Red Lion Court, Fleet Street. 



