396 INDEX. 



Klectiic spark, om.-tiuition of (SCHU8TEK n<l 11EM3ALECH), 18<J; potential variation with pressure (8TBUTT), '>'' 



Electrical conductivity of flames containing vaporised salts (SMITH KM.-. HAW-SON . and WILSON), 89. 



Klectrocapillary phenomena, relation to potential differences between solutions (SMITH), 47. 



Electrometer, capillary, theory of (SMITH), 47. 



EWI.NU (J. A.) and HOMENHAIN (W.). The Crystalline Structure of Metals. BAKEKIAN l.i.i ri i;i , 353. 



V, 



FILON (L. N. it ). On the Resistance to Torsion of certain Forms of Shafting, with special Reference to the Effect of 



Keyways, 309. 

 Flames, electrical conductivity of, and luminosity of salt vapours in (SMITHELLB, UAWSON, and WILSON), 89. 



G. 

 Gravity balance, quartz thread (TuBELFALL and POLLOCK), 215. 



H. 



HEMSALBCH (UUSTAV). See SCHUSTKB and HEMSALECH. 



Hertzian oscillator, vibrations in field of (PE.VHSON and LEE), 159. 



Hysteresis in the relation of extension to stress exhibited by overstrained iron (Mum), 1. 



Ions, diffusion into gases, determination of coefficient (TowNSKND), 129. 

 Ions positively and negatively charged, as condensation nuclei (WILSON), 289. 

 Iron, recovery of, from overstrain (HuiR), 1. 



L. 



LEG (ALICE). See PEARSON and LEK. 



Luminosity, colour sensations in terms of (ABNET), 259; of flames; caused by salts; suppression of (Surf HELLS, 

 DAWSOX, and WILSON), 89. 



M. 



Metals, crystalline structure of; effects of strain (KwiNO and ROSEN MAIN), 353. 

 Molecules, number of, per c.c. of a gas; weight of (TOWN8END), 129. 

 MUIB (JAMK8). The Recovery of Iron from Overstrain, 1. 



