Chemical Affinity in terms of Electromotive Force. 357 



(II.) Values obtained with electro-deposited copper on each 

 electrode. 



(a) When the copper had been deposited some 48 hours, 

 the electrodes being in the voltameter out of contact of air: — 



15-2 



1-7 



•018 



•002 



•016 



30-2 



3-5 



•025 



•003 



•022 



91-5 



10-6 



•036 



•010 



•026 



212-0 



24-7 



•050 



•023 



•027 



403-0 



466 



•079 



•044 



•035 



749-0 



86-6 



•137 



•082 



•055 



(b) When the copper had not been deposited so long, from 

 15 to 20 hours after deposition : — 



15-2 



1 

 1-7 ! 



•015 



•002 



•013 



22-8 



2-6 



•017 



•003 



•014 



30-2 



3-5 



•020 



•003 



•017 



450 



5-2 



•024 



•005 



•019 



89-1 



10-3 



•033 



•010 



•023 



253-0 



29-2 



•052 



•028 



•024 



420-0 



48-6 



•078 



•046 



•032 



774-0 



89-6 



•130 



•085 



•045 



1328-0 



153-5 



•205 



•146 



•059 



(c) When the copper had only been deposited a few minutes 

 before each observation was made : — 



16-6 



1-9 



•011 



•002 



•009 



28-4 



3-3 



•014 



•003 



•011 



423 



4-9 



•018 



•005 



•013 



134-5 



15-5 



•031 



•015 



•016 



240-0 



27-7 



•048 



•026 



•022 



383-0 



44-3 



•070 



042 



•026 



740-0 



85-5 



•116 



•081 



•035 



1311-0 



151-6 



•190 



•144 



•046 



By interpolation, the following values for e are calculated 

 from the above figures : — 



Current, in 

 niicrowebers. 



I. 



Ila. 



IB. 



He. 



10 



•031 







___ 



__ 



20 



•032 



•017 



•014 



•010 



50 



•037 



023 



•020 



•013 



100 



•041 



026 



•023 



•015 



200 



•043 



•027 



•024 



•020 



500 



•049 



•043 



•03(> 



•029 



1000 



— 



— 



•050 



•040 



From which it is evident that the more freshly deposited the 

 electro-copper was, the less was the value of e, — leading to 



