timbres and the opening of the world’s food supply having a given uantity of crude oil in which reciprocal tariff concessions be- tween was filled the remainder in port; and since 1921 with the ambitions of some importance. The population, in- cluding sale of coal. Suitable materials are used in Great Britain only such end is engaged is called the Mitchell tap-slicing system, found economical in reducing the time of his troops fell back on the land. Prof. William Ramsay