716 



INDEX. 



Thorium, on the transmission of the 

 radioactivity of, 95 ; on the radio- 

 activity of, 445, 561. 



Tide, on the theory of the fortnightly, 

 136. 



Townsend (Prof. J. S.) on the con- 

 ductivity produced in gases by the 

 aid of ultra-violet light, 389 ; on 

 the specific ionization produced by 

 corpuscles given out by radium, 

 698. 



Trowbridge (Prof. J.) on the spectra 

 of hydrogen and reversed lines in 

 the spectra of gases, 153, 524; on 

 the gaseous constitution of the H 

 and K lines of the solar spectrum, 

 524. 



Tungsten alloy, on the effect of 

 temperature on the hysteresis loss 

 in a, 117. 



Vaughan (A.) on Jurassic strata cut 

 through by the S. Wales direct 

 line, 175. 



Vector differentials, on, 187. 



Vibrating systems, on the special 

 epochs in, 511. 



Vibrations, on the free, of systems 

 affected with small rotatory terms, 

 293 ; on the, of a rectangular sheet 

 of rotating liquid, 297. 



Ultra-violet light, on screens trans- 

 parent only to, 257 ; on the con- 

 ductivity produced in gases by, 

 389. 



Uranium, on the radioactivity of, 

 441. 



Voltaic potential-difference, on the 

 removal of the, by heating in oil, 

 591. 



Wadsworth (F. L. 0.) on the effect 

 of absorption on the resolving- 

 power of prism-trains, 355. 



Waterfalls, on induced radioactivity 

 excited in air at the foot of, 

 419. 



Watts (Dr. W. M.) on the relation- 

 ship between the spectra of some 

 elements and the squares of their 

 atomic weights, 203. 



Waves, electrical, on the connexion 

 between, and chemical energy &c, 

 208 ; on the variation of potential 

 along a wire transmitting, 331 ; 

 on the propagation and attenuation 

 of, along wires, 643. 



Wedge, on the use of contour inte- 

 gration in the problem of diffrac- 

 tion by a, 374. 



Whetham (W. C. D.) on the theory 

 of electrolytic dissociation, 279. 



Whitaker (W.) on well-sections in 

 Suffolk, 386. 



Wiedemann effect in ferromagnetic 

 substances, on the, 650. 



Wilberforce (Prof. L. R.) on an ele- 

 mentary treatment of conducting 

 networks, 489. 



Wilderman (Dr. M.) on the con- 

 nexion between the energy of 

 electrical waves or of light and 

 chemical energy &c., 208 ; on the 

 connexion between freezing-points, 

 boiling-points, and solubilities, 405. 



Wills (R. L.) on the effect of tempe- 

 rature on the hysteresis loss in 

 iron, 117. 



Wilson (H. A.) on the charge on the 

 ions produced in air by Rontgen 

 rays, 429. 



Wires, on the variation of potential 

 along, transmitting electric waves, 

 331 ; on the speed of propagation 

 and attenuation of electric waves 

 along, 643. 



Wood (Prof. R. W.) on screens trans- 

 parent only to ultra-violet light, 

 257. 



X-rays, on secondary radiation from 

 gases subject to, 685. 



Zero, estimation of the absolute, 55. 



END OF THE FIFTH VOLUME. 



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