CONDUCTIVITY AM) LUMINOSITY OF FLAMES COXTAIMM: VAI'i >1;IH.I > SALTS. 115 



assume that the equation used by THOMSON and RUTHERFORD to represent the rela- 

 tion between the current and the E.M.F. in their experiments should also represent 

 the relation between and the E.M.K. in our experiment!, 

 Accordingly, then, the equations 



c = + *,E . (2) 



(3) 



should represent the value of the current strength at all E.M.F.8 in our experiments. 

 In the case of Rontgenised gases &, = 0, or is very small, so that c = t. 



In the following tables the observed currents for various salts are compared with 

 those calculated by means of equations (2) and (3), and curves calculated by means 

 of these equations, using in each case the values given below for /,. k, and I, are 

 dotted in the curve diagrams V, VII, and VIII. The points marked near them show 

 the experimentally determined currents. 



KC1 



f K ' CO " 



I - 4-50 x 10-'. 

 *, - -278 x 10-'. 

 k, = -020 x 10*'. 



_N KjSO, 

 10 2 



I - 4-23 x 10-*. 

 *, - -74 x 10-. 

 It, - -148 x 10 + . 



Q 2 



