﻿616 



INDEX. 



Thorium, on the origin of the /3 rays 

 emitted by, 177;" on the mass of 

 the a particles from, 371. 



Torsion, on tests of metals in reverse, 

 426. ' 



Treacher (LI.) on the phosphatic 

 chalks of Winterbourne and Box- 

 ford, 171. 



Trouton (Prof. F. T.) on leakage 

 currents in the moisture condensed 

 on glass surfaces, 336. 



Tuckerman (L. B., jr.) on the 

 thermodynamical theory of radia- 

 tion, 498. 



Ultraviolet light, on chemical and 

 electrical changes induced by, 397. 



Uranium, on the coefficient of ab- 

 sorption of the /3 rays from, 379 ; 

 on new methods for separating 

 uranium X from, 393. 



Vibration-curves of string and air 

 obtained from a monochord, on 

 simultaneous, 576. 



Vision under water, on, 159. 



Watts (Dr. "W. M.) on the Swan 

 spectrum, 581. 



Waves of magnetic flux, on the pro- 

 pagation of longitudinal, along 

 iron wires and rods, 433. 



, electric, on the effect of a long- 

 straight wire on, 46. 



, heat, on a new method of 



isolating, 67. 



White (H. J. O.) on the phosphatic 

 chalks of Winterbourne and Box- 

 ford, 171. 



Wilkinson (H. M.) on the Swan 

 spectrum, 581. 



Willows (Dr. R. S.) on the electrical 

 resistance of allovs, 604. 



W 7 ilson (Prof. H. A.) on the theory 

 of " moving-coil " galvanometers, 

 269. 



W 7 ire, on the effect of a long straight,, 

 on electric waves, 46 ; on the 

 deflexions caused by a break 

 in an overhead, carried on poles, 

 200. 



Wireless telegraphy, on the radiation 

 from bent antennas in, 588. 



Wood (Miss E. M. R.) on the Tar- 

 annon series of Tarannon, 166. 



W 7 ood (Prof. R. W.) on interference- 

 colours of chlorate of potash crys- 

 tals and a new method of isolating 

 heat-waves, 67 ; on abnormal po- 

 larization and colour of light 

 scattered by small absorbing par- 

 ticles, 147 ; on fish-eye views and 

 vision under water, 159 : on the 

 fluorescence, magnetic rotation, 

 and temperature emission spectra 

 of iodine vapour, 329 ; on the 

 fluorescence and magnetic rotation 

 spectra of sodium vapour, 499 ; on 

 the intensification of glass dif- 

 fraction-gratings and the diffraction 

 process of colour photography, 

 585. 



X ravs, on the recombination of ions 

 made by, 273. 



END OF THE TWELFTH VOLUME. 



Printed by Taylor and Francis, Bed Lion Court, Fleet Street. 



