924 



INDEX. 



Suli's motion with respect to the 

 iether, on the, 417. 



Sutherland (W.) on the fundamental 

 constant of atomic vibration and 

 the nature of dielectric capacity, 1 ; 

 on molecular diameters, 25; on 

 the theory of the small ion in 

 gases, 817. 



Telephone circuits, on, 673. 



Telephonic intelligibility, on, 152. 



Thermal conductivity, on a new- 

 method of determining, 587. 



Thermo - electric currents, on the 

 direction of, 508. 



Thermometers, on electrical record- 

 ing, for clinical work, 538. 



Thomson (Sir J. J.) on a theory of 

 the structure of the electric field 

 and its application to Rontgen 

 radiation and to light, 301 ; on 

 rays of positive electricity, 424. 



Thornton (Prof. W. M.) on the 

 polarization of dielectrics in a 

 steady field of force, 390. 



Toepler pump, on an automatic, 

 863. 



Torsional angle of a rotating shaft 1 

 on an optical method of reading 

 the, 300. 



Tyndall (A. M.) on the pressure of 

 the electric wind in hydrogen 

 containing traces of oxygen, 449. 



Ultra-violet spectrum, on the elec- 

 trical effect of the, 290. 



Uranium X, on the constant of, 

 847. 



Uranous and uranyl compounds, on 

 the absorption spectra of, 566. 



Water, on the variation of disk 

 resistance with temperature in, 

 513. 



Waters (J. W.) on radioactive mine- 

 rals in common rocks, 903 ; on 

 the rate of decay of the radio- 

 activity of polonium, 905. 



Waves, on the damping of long, in 

 a rectangular trough, 205 ; on the 

 bending of electrical, round the 

 earth, 276, 435, 757 ; round a 

 large sphere, on the, 516; on the 

 decay of, in a canal, 906. 



Wellisch (E. M.) on the theory of 

 the small ion in gases, 201. 



Weston normal cell, on cadmium 

 amalgams and the, 250. 



Wilde (Dr. H.) on a new binary 

 progression of the planetary dis- 

 tances, and on the mutability of 

 the solar system, 597. 



Wilson (Prof. PJ. A.) on the relative 

 motion of the earth and aether, 

 809. 



Wind, on the relation between peri- 

 odic variations of pressure, tem- 

 perature and, in the atmosphere, 

 26, 448; on the pressure of the 

 electric, in hydrogen, 449. 



Wire, on anomalous effects on first 

 loading a, 619. 



X radiation, on secondary homo- 

 geneous, 897. 



END OF THE NINETEENTH VOLUME. 



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



