Gooch and Kobayashi — Platinized Anode of Glass, 55 



and collected upon the asbestos was dissolved in a cold mix- 

 ture of sulphurous and sulphuric acids, and the solution, filtered 

 on paper from the asbestos, was evaporated. The residue 

 was dried over tlie radiator, at about 450°, and weighed as 

 the anhydrous sulphate. 



The material taken for analysis was a solution of manganese 

 sulphate standardized by evaporating portions of the solution 

 to dryness, drying over the radiator, at about 450°, and weigh- 

 ing as the anhydrous sulphate, MnSO,. 



Details of these experiments are given in the following 

 table. 



Electrolysis of Manganous Sulphate. 



(Yolume lOO'^"^ : anode surface of platinized glass, 25<=°'^ (approx.) : anode revolu- 

 tions, 150.) 



Manganese 



taken as 



sulphate 



grm. 



Manganese 



deposited as 



hydrated di- 



! oxide and 



weighed as 



sulphate 



grm. 



Error 

 grm. 



Initial current 

 amp. volt 



Time Reagents added 

 min. 







Large 



cathode 



: 3 (1 cm. X 5 cm.) 



0-1080 



0-1057 



-0-0028 



1-7 



12-5 



120 j Chrome alum, 0-5 grm. 

 I Acetic acid, 5<='»3 













0-1080 



0-0922 



-0-0058 



1-6 



13- 



120 



0-1080 



0-1080 



0-0000 



1-6 



12-5 



150 



0-1080 



0-1073 



-0-0007 



1-7 



14-8 



150 



0-1080 



0-1086 



+ 0-0006 



1-6 



10-3 



150 



0-1098 



0-1094 



-0-0004 



1-5 



16- 



150 



0-1098 



0-1095 



-0-0003 



1-6 



15- 



150 



0-1098 



0-1074 



-0-0024 



1-6 



16- 



180 j Alcohol, lO'^'"^ 

 Acetic acid, 5'='^^^ 













0-1098 



0-1040 



-0-0058 



1-5 



18-3 



180 



0-1098 



0-1097 



-0-0001 



1-6 



18- 



240 (Alcohol, 5<=>"3 



Acetic acid, 5^™^ 













0-1098 



0-1095 



-0-0003 



1-5 



18- 



240 



01098 



0-1098 



0-0000 



1-5 



18-3 



240 



0-1098 



0-1093 



-0-0005 



1-5 



18-3 



240 







Small cathode 



: 0-5 cm. x 5 cm. 



0-1082 



0-0875 



-0-0207 



1-2 



27 



150 i Alcohol, 5^™3 

 < Acetic acid, 5'='^^ 

 ( Ammonium sulphate, 2 grm 



0-1082 



0-1081 



-0-0001 



1-2 



26 



180 '' 



0-1082 



0-1080 



-0-0002 



1-2 



25 



210 



0-1082 



0-1081 



-0-0001 



1-2 



25 



210 '' 



0-1082 



0-1084 



+ 0-0002 



1-2 



26 



210 '' 



0-1082 



0-1080 



-0-0002 



1-4 



25 



240 



0-1082 



0-1079 



-0-0003 



1-2 



33 



240 f Alcohol, 5<=-3 

 A Acetic acid, 5'^^^ 

 (.Ammonium sulphate, 1 grm, 



0-1082 



0-1085 



-f-0-0003 



1-1 



35 



240 j Alcohol, 5<=°i3 



Acetic acid, 5<='^3 



