PROF. A. V. HILL, senior secretary of the Royal Society, is visiting Copenhagen to convey the greetings of the Royal Society, as representing the men of science of Great Britain, to their colleagues in Denmark; and through the Academy of Sciences in that country to discuss with them what aid British science can give to the rehabilitation of science and scientific education in their country. After three days in Copenhagen, Prof. Hill will proceed to Oslo for the same purpose. An extraordinary meeting of the Norwegian Academy of Sciences has been called to meet him. It is hoped that these visits will do much to enable both the Danes and Norwegians to re-establish the firm scientific contacts which, until the occupation of their countries by the Nazis, they have always maintained with men of science throughout the world.