Mr. J. S. Macdonuld. 



Experiments with Solutions of KC1. 



Concentration 



E.M.F. recovered, 



Grain Gramme-mols. in terms of the 



per cent . per litn>. initial value E. 



7-45 1 E x 0-10 = E log 1-2 



3-72 ExO-34 = Elog2'2 



1-86 I ExO-60 = Elog4 



0-93 | ExO-90 = ElogS 



The law connecting the effects of solutions of Nad is not very 

 different, as is shown by examination of the results of the following 

 experiments made before the relation was discovered. The results are 

 in this case none the less remarkable in so far as the concentrations of 

 the solutions used bear no simple proportion to the normal solution of 

 1 gramme-molecule per litre (5 '85 per cent.). 



Experiments with solutions of NaCl. 



Concentration . 



E.M.F. recovered, 



Grammes Gramme-mols. in terms of E, 



per cent. per litre. the initial value. 



(1.) 0-45 E x 1-15 - E log 14-1 



13 



(2.) 0-6 4? ExO-92 = Elog 8'3 



y * i 



(3.) 0-9 Ex 0-77 = Elog 5-9 



6 '5 



(4.) 3-0 -1 ExO-34 = Elog 2-2 



1 *9 



(5.) 6-0 Ex 0-13 = Elog 1-3 



0-97 



Presuming temporarily the law connecting these results to be 



"E n = Elog-," then the concentration multiplied by the number of 



n 



which the logarithm is the proportion between the final and initial value 

 of the E.M.F., should equal unity. 



Thus 



