For release on receipt UMD Mews Service April 7, 195B DULUTH—John Tuzo Wilson, Toronto, one of Canada's leading geologists, will be the featured speaker at several UMD science sessions culminating with the third annual Science Fair Saturday (April 12). He will address an all-school convocation at 10s30 aem3 Friday (April 11) on "Geophysics and Continental Evolution," in the Science auditorium. At 8 p.m. Friday in the auditorium, he will address a joint meeting of the lake Superior Geology club and Sigma Xi, honorary science research fraternity, on "The Crust of the Earth*" His Science Fair appearance at 10s30 a.m., Saturday also will be on "Geophysics and Continental Evolution," All appearances will be open to the general public without charge, A native of Ottawa, Canada, he received degrees from the University of Toronto and the University of Cambridge before getting the Ph.D. from Princeton university in 1936, An assistant geologist with the Canadian Geological survey from 1936 to 1939, Dr. Wilson served in the Canadian army seven years, including four years overseas and three years as director of operational research and of Operation Musk-ox, The latter was the extensive Oanadian-U,S. operation to test winter equipment and transportation. His war-time decorations included the Order of British Empire and Legion of Merit (U.S.) - more - -2- Now professor of geophysics at the University of Toronto, he is president of the International Union of Geodesy and Geophysics, He also holds membership on the Canadian National Research council. He was an observer on the first U, S, air force flight over the North Pole in 1946, In 1947 he was chairman of the Arctic Institute of North America, He has boon a distinguished lecturer on tour for the Society of Exploration Geophysicists and in 1957 made a lecture tour in Romania in connection with the International Geophysical year. His UMD appearance will be one of a number sponsored by the Sigma Xi fraternity. - 1 - r.