1044 



INDEX. 



Walker (W. J.) on the relationship 

 between the viscosity, density, 

 and temperature of salt solutions, 

 288. 



Watt (W. R.) on the geology 

 of the country round Huntly, 

 1035. 



Wave-lengths, on the application of 

 crossed spectra to the measure- 

 ment of differences in, 126. 



Waves, on deep-water, 385 ; on the 

 momentum of progressive, 436 ; on 

 the differential equation applicable 

 to plane progressive, 669. 



White (G. W.) on the properties of 

 selenium blocks, 370. 



Whispering gallery, on applications 

 of Bessel's functions to the problem 

 of the, 100. 



Wien's law, on, 616. 



Wilson (Prof. H. A.) on the distri- 

 bution of scattered Rontgen radi- 

 ation, 383. 



Wilton (J. R.) on deep-water waves, 

 385. 



Wireless telegraphy, on ionization 

 of air and long-distance, 213. 381 ; 

 on the forthcoming eclipse of the 

 sun and, 753. 



Wires, on regular surface markings 

 in stretched, of soft metals, 869. 



Wood (Prof. R. W.) on the separ- 



, ation of close spectrum lines for 

 monochromatic illumination, 524 ; 

 on the production of a very intense 

 sodium flame, 530 ; on a photo- 

 metric study of the fluorescence of 

 iodine vapour, 531 ; on the fluor- 

 escence of gases excited by ultra- 

 Schumann waves, 899 ; on the 

 magneto-optics of iodine vapour, 

 1009 ; on the separate excitation 

 of the centres of emission of the 

 D lines of sodium, 1018 ; on a 

 photometric investigation of the 

 superficial resonance of sodium 

 vapour, 1025. 



Worley (Prof. F. P.) on the decline 

 of the hypothesis of ionic disso- 

 ciation, 459. 



X rays, on the ionization in com- 

 pounds of carbon, hydrogen, and 

 oxygen by homogeneous, 3 77 ; on 

 the theory of reflexion of, 315, 

 675 ; on the intensity of reflexion 

 of, by crystals, 881. 



Zeeman effect, on an anomalous, in 

 satellites of mercury lines, 333. 



END OF THE TWENTY-SEVENTH VOLUME. 



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



