AT the invitation of the Government of Canada and under the auspices of the Canadian National Research Council, the Pacific Science Association will hold the fifth Pacific Science Congress, for the study of Pacific problems, in Victoria and Vancouver, B.C., Canada, on June 1–14. It is expected that some thirty countries bordering on the Pacific Ocean will be represented at the Congress by four to six hundred men of science. The president of the Executive Committee of the Congress will be Dr, H. M. Tory, president of the National Research Council of Canada and director of the National Research Laboratories. The Congress will open at Victoria on June 1, where sessions will be held until June 3. On June 4, it will proceed to Vancouver, where further sessions will be held until June 14. A post-Congress tour has also been arranged from June 14 until June 19, when it will terminate at Calgary. The Congress will work in two divisions: Biological Sciences, under the chairmanship of Prof. C. McLean Fraser, professor of zoology at the University of British Columbia, Vancouver, and Physical Sciences, under the chairmanship of Prof. R. W. Brock, professor of geology and geography at the University of British Columbia. The secretary of the Congress is Mr. S. J. Cook of the National Research Council, whose address, in connexion with the Congress, is Hotel Vancouver. Vancouver, B.C., Canada.