PROF. G. R. GOLDSBROUGH‘S retirement from the chair of mathematics at King‘s College, Newcastle -upon-Tyne, breaks a long and distinguished association with the College. He is an old student of the College, who returned to it in 1919 as lecturer in applied mathematics ; in 1928 he was promoted to a professorship, and he has been head of the Department of Mathematics for the last three years. His research Work has been mainly on two lines : in hydrodynamics he has made important contributions to the dynamical theory of the tides, and in astronomy he has elucidated the classical problem of the divisions in Saturn‘s ring. He was elected to the Royal Society in 1929. His interest in astronomy and geodynamics has been of special value in connexion with the Work of the University Observatory at Durham. In addition to teaching and research, Prof. Goldsbrough has taken a leading and influential part in administrative and other activities in the University, and his sound judgment and advice have been greatly appreciated. He was sub-rector of the College for the period 1942-47 ; and among many other duties he undertook the arduous task of chairmanship of the Joint Recruiting Board. He was awarded the C.B.E. in 1948. His colleagues and old students will wish him in his retirement many pleasant years of fruitful activity. He has been succeeded at King‘s College by Profs. A. E. Green and W. W. Rogosinski (see Nature, September 18, p. 445).