704 



INDEX. 



Thomson (Sir J. J.) on mass, energy, 

 and radiation, 679. 



Time, on the measurement of, 366. 



Titanium, on the excitation of the 

 spectrum of. by thermelectronic 

 currents, 241. 



Tobin (T. C.) on the construction of 

 a parabolic trajectory, 157. 



Turbulence in the ocean, on, 578. 



Tykocinski-Tykociner (J.) on the 

 Mandelstan method of measure- 

 ment of frequency of electrical 

 oscillations, 289. 



Vanadium, on the excitation of the 

 spectrum of, by thermelectronic 

 currents, 241. 



Vapour, on the specific heat of satu- 

 rated, 633. 



Vapour-pressure formula, on the in- 

 tegration constant of the, 1, 21. 



Vibrations, on variably coupled, 294. 



Violin-player, on a mechanical, 535. 



Visibility, on an instrument for the 

 measurement of, 96. 



Water, on the rate of solution of 

 nitrogen and oxygen by, 385 ; on 

 the molecular rotational frequencies 

 of, 565. 



Waves, on the diffraction of, by 

 a screen with a straight edge, 

 668. 



Whiddington (Prof. R.) on the X-ray 

 spectra of the elements. 694. 



Wood (Prof. E. W.) on light scat- 

 tering bv air and the blue colour of 

 the sky/ 423. 



X-ray spectra of the elements, on 

 the, 694, 



Xenon, on the mass-spectrum of, 

 623. 



Zinc oxide, on the crystalline struc- 

 ture of, 647. 



END OF THE THIRTY-NINTH VOLUME. 



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



