458 



MESSRS. R. S. BUTTON AND J. E. PETAVEL ON ELECTRIC 



TABLE VI. Details of One Typical Carborundum Experiment (continued). 



Total gas production during the run calculated to be 840 litres at C. and 760 millims. 



Product closely adhering to central core formed a fritted mass cylindrical in shape, about 15 centims. 

 diameter and 27 centims. long. 



Total weight, 3600 grammes. Inner layer about 2 centims. thick, consisting of crystalline carborundum 

 surrounded by thin sheath of the amorphous variety. The outer layers on analysis found to consist of 

 agglomerated carbon and sand, containing only small percentage of carborundum. 



Granular carbon core had been graphitised, but contained no carborundum. 



TABLE VII. Record of Furnace Gas Analyses in a Carborundum Experiment. 



