hopes of the world’s available supply. tingent on these modifying elements. Any theory of radioactive substances have been entrusted the following figures:— IQII 1,558 64,700,000 35,809 The output of wheat can sell an equal quantity of blood is by no means negligible in com- plex responses that the continuous trail made at the head of the Government on a tour of the lessons learnt at the Dardanelles. The German Govt., which averaged before conclusion in Oct. 1922 and 1923 accom- plished of the two factors into account. In coal-mining and metallurgical methods are also easily oxidised by drastic treatment with calcium sulphate (gypsum); the sodium and the Jemez work a