(1) It has been said that oxides are formed by the glow-electrolysis of zinc sulphate solution. From the above studies, however, it is known that ZnSO4·3Zn(OH)2 is formed, and the colloidal solution of zinc hydroxide is obtained with very dilute solution, as 8.04×10−6 Mol. (2) It has been said that oxide or hydroxide is formed in the cupric sulphate solution. From the above researches, however, the basic salt, 2CuSO4·5Cu(OH)2·H2O, is obtained from its concentrated solution of over 0.002 mol., and CuSO4·3Cu(OH)2 is obtained from under 0.002 mol. and colloidal solution of simple hydroxide, CuO·2H2O, is formed with the very dilute solution of 5×10−6 mol./l. (3) The reason for the abnormally large current efficiency such as about 120% has not been cleared. From the following facts, it is cleared that this is the result of the secondary formation of the basic salt. (a) The comparison of the ordinary method of formation of the basic salt with its formation by the glow electrolysis. (b) The agreement between the current efficiency of hydroxide contained in basic salt as a constituent and that of hydroxide produced in a very dilute solution. (c) The weight of copper anodically dissolved shows the current efficiency of about 100%. (d) The weight of the basic salt, ZnSO4·3Zn(OH)2-H2O which is formed from ZnO, is the sum of the weight of ZnO taken and the weights of ZnSO4 and water combined. (4) For the mechanism of the glow-electrolysis, there is no need to consider the effect of heat caused by impacts between electrons and ions, etc., because the green 2CuO·H2O which is obtainable at ordinary tem？erature is formed in a very dilute solution and it changes to black 6CuO·H2O by heating over 77°C.
(1) The durability experiments with the catalysts, Co+15%ThO2+100% Kieselguhr and Co+12%U3O8+2.5%Cu+100% Kieselguhr, are reported and tabulated. (2) Following mainly the gas analysis data, the normalized reaction was discussed with special reference to the initial formation of CH4. (3) Some correlations with the formation of C2H4, in connection with our reaction mechanism already proposed, as well as the predominating tendency of CH4 formation at higher reaction temperature have been given.