with the Mercury Cathode. 



381 



Table V. 



Total NaCl 

 sol. -IN, No. of 

 added addi- 



cm s . tions 



No. of times 

 anode was 



heated dur- 

 ing process 



to free from 

 oxide 



Total time 

 of electro- 

 lysis 

 min. 



Initial and final 

 current condi- 

 tions 

 amp. volts 



Amount 

 of silver 

 recovered 

 by distil- 

 lation 

 grms. 



47-98 

 48-12 



11± 



24 

 24 



12 



Part 1. 



3 

 3 



(Silver-plated anode.) 



305 

 232 



}SH 8 I 



Part 2. (Silver anode.) 

 4 1077 



Part 3. (Silver plated anode.) 



0075 

 0083 



•0162 



50-00 

 50-00 



1 

 1 





 



38 

 31 



•6-03 

 1-0-03 



7-4-8 

 << 



•0006 

 •0005 







Part 4. (Silver plated anode.) 







Experiments 



50-02 



50-00 



50-00 



50-00 



3-6 in Table IV. 

 1 

 ] 

 1 



1 



14 

 18 

 19 

 18 



1-4-0-1 

 1-4-0-1 

 1-3-0-09 

 1-17-0-1 



7-2-8") 

 7-2-8 I 

 7-2-8 f 

 7 -4-8 J 



•0005 







Part 5. (Silver 



plated 



anode.) 







50 

 50 

 50 

 50 



1 



1 

 1 

 1 





 

 

 



14 

 16 

 13 

 11 



1-2-0-2 

 1-2-0-2 

 1-5-0-19 

 1-2-0-19 



7-4-8 ^ 



" \ 



" J 



•0001 



Next, two experiments with the platinum anode, silver 

 covered, were made separately, the current being interrupted, 

 as before, when it fell to *03 ampere. From the data in Part 

 3 of Table Y it is seen that a quantity of silver, half of a 

 milligram, analytically appreciable, was recovered from the 

 mercury in each experiment. Previous to these experiments 

 the anode was freshly plated and after each the anode was 

 treated with hydrogen at a high temperature to reduce the 

 silver chloride. Other data from these same experiments was 

 given previously in Part 2 of Table III. 



A^ain four electrolyses were made, reducing the silver 

 chloride on the anode more or less completely between each 

 electrolysis and stopping the current at - 01 ampere. [Examin- 

 ation of the liquid of the inner cell (expts. 3-6 Table IV) 

 showed the decomposition of the sodium chloride complete 

 under these conditions.] The amount of silver transferred to 

 the mercury in the four experiments, recovered by distillation, 



