CONDUCTIVITY AND LfMlNosiTY OF FLAMES CONTAIN! M: V.M-nKlsKM s.M.TS. 



Our results are in harmony with those of ARRHENIUS in so far as they show that 

 Ohm's law is only valid at low electromotive forces in the case of vaporised salts. 



To express the general relationship between current strength and electromotive 

 force, ARRHENIUS gives the equation C = A/"(E), where C = current strength, 

 E = electromotive force, and A = a constant dependent on the solution sprayed. He 

 found that for any electromotive force (E), /(E) was the same for solutions of 

 different salts and of different concentrations. 



The validity of this equation is also confirmed by our olwervations up to a certain 

 point, but with more concentrated solutions marked divergence is apparent. This 

 will be evident from the following table. 



The T^J normal solutions of potassium salts which we investigated all gave 

 approximately the same current for any one electromotive force. We have, there- 

 fore, used these to calculate some values of/(E). Taking /(E) = 1 when E= 5 

 volts, we get from the numbers for 7^5 normal KC1 and T ig normal K,CO, solutions 

 the following values : 



From these values of /(E) we calculate the current which should l>e found in the 

 case of a series of salts, and the numbers so obtained are inserted in a table side l>y 

 side with those indicating the currents actually measured : 



It is evident from the foregoing table that the formula C = A/ (E) does not express 

 the relation existing between current strength and electromotive force over the series 

 of oliservations made by us. 



We are indebted to Professor J. J. THOMSON for a suggestion which has led us to 



VOL. i Xt 111. A. Q 



