732 



IND 



Wilderman (Dr. M.) on the velocity 

 of reaction "before complete equi- 

 librium and the point of transition 

 are reached, 270 ; 468. 



Williams (W. E.) on the magnetic 

 change of length and electrical 

 resistance in nickel, 430. 



Wilson (H. A.) on the laws of elec- 

 trolysis of alkali salt-vapours, 207; 

 oil the current - density at the 

 cathode in the electric discharge 

 in air, 608. 



EX. /_ 



Wood (Prof. R. W.) on uneven 

 distribution of light in a diffrac- 

 tion-grating spectrum, 396 ; on 

 the electrical resonance of metal 

 particles for light- waves, 425 ; on 

 the Clayden effect and reversal of 

 spectrum lines, 606. 



Young's modulus, on the measure- 

 ment of, 402. 



Zettwuch (G.) on the blue colour of 

 the sky, 199. 





END OF THE FOURTH VOLUME. 



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



