Dr. Wittrick took the Mechanical Sciences Tripos at Cambridge in 1942, was awarded First Class Honours and the Archibald Denny Prize; has held positions of Demonstrator in Engineering at Cambridge, Senior Lecturer and, more recently, Reader in Aeronautical Engineering at Sydney University; over the last ten years has made notable contributions to the theory of elasticity. In 1949 he received the Ph.D. degree and in 1953 was awarded a Fulbright Fellowship and a Research Fellowship at California Institute of Technology to work in his special field of theory of elasticity. That work together with his earlier contributions are highly regarded in America.