﻿t^Ut 



1008 



INDEX. 



Yirial of a mixture of ions, on the, 



551. 

 Viscosity, on the, of liquids, 458. 

 Walmsley (H. P.) on changes in 



diffraction spectra produced by 



aberration and the aberration of 



an echelon grating, 25. 

 Water, on the viscosity of, 458. 

 — — drops, on the effect of electricity 



on streams of, 148. 

 Weir, on the problem of the, 772. 

 Wellisch (Prof. E. M.) on the 



distribution, of the active deposit 



of radium in an electric field, 714. 

 Wiegand (W. B.) on the effect of 



electricity on streams of water 



.drops, 148. 

 Wien's displacement law, on the 



Wilson (Prof. H. A.) on the theorv 

 of spectral series, 660 ; on the 

 relation between the ranges of 

 a particles and the periods of 

 transformation of radioactive 

 bodies, 981. 



Wood (Prof. R. W.) on diffraction 

 gratings with controlled groove 

 form and abnormal distribution 

 of intensity, 310 ; on selective 

 reflexion, scattering, and absorp- 

 tion by resonating gas molecules, 

 689. 



X-rays, on the absorption of, and 

 fluorescent X-ray spectra, 987. 



Xylol-alcohol mixtures, on the 

 electrical resistance of, 668. 



END OF THE TWENTY-THIRD VOLUME. 



Printed by Taylor and Francis, E,ed Lion Court, Fleet Street. 



