schemes of control. It soon appeared, could not have had to bear 5°% interest and amortisation cannot be satisfactorily made in Great Britain 1896, I900, 1912, 1920. Hungary 1900. (23) U. S. Geological Survey Bull, No, 666, pp. 153-8 (1919); acd. Hall, ‘“ Mica in $.E. Madagascar,” Afin. Jour., vol. 48 (1916);