DR. LESLIE R. MOORE, at present reader in stratigraphy in the University of Bristol, has been appoited to the Sorby chair of geology in the Unnrersity of Sheffield, in succession to Prof. F. W. Shotton (see Nature, 155, 664 ; 1945), who has been appointed to the chair of geology at Birmingham. It is expected that Prof. Moore will take up his duties at the opening of the new session in October next. After taking his first degree at the University of Bristol in 1934, Dr. Moore carried out postgraduate work on "The Sequence and Structure of the Somerset and Gloucestershire Coalfields", for which he was awarded the Ph.D. degree. His first university appointment was in the Department of Geology, University College, Cardiff ; later he became research fellow and lecturer in geology in the University of Glasgow, before returning to Bristol as reader in stratigraphy. Dr. Moore's researches have dealt especially with the geology of coal measures and oil shales and are notable for the employment of new techniques, to the development of which he himself has made substantial contributions.