THE fiftieth anniversary of the opening of the Oxford University Museum was celebrated on Thursday last, and a large number of distinguished men of science, representing the universities and scientific societies and institutions of Great Britain and Ireland, assembled to do honour to the occasion. The proceedings were short, and may be very shortly described. The guests assembled in the Sheldonian Theatre, where the honorary degree of Doctor of Science was conferred on Prof. Svante Arrhenius and Mr. A. G. Vernon Harcourt. Fifty years ago Mr. Harcourt was acting as Brodie's lecture assistant, and was engaged in setting up the apparatus for the first lectures delivered in the new museum. Hearty congratulations were tendered by those present on his unimpaired vigour and energy after so many years' active and distinguished scientific work. After receiving congratulatory addresses from universities and learned societies, the Vice-Chancellor read a letter from the Chancellor, and delivered an address which was singularly felicitous both from its style and from the evident sincerity with which he expressed his sympathy with the progress of scientific studies in the University of Oxford.