ALTHOUGH the number of members present at Glasgow was much smaller than was expected, the attendance at the meetings of Section A was well maintained. The papers presented to the Section were unusually numerous, and endeavours had to be made to restrict each speaker to the twenty minutes allowed by the rules of the Section. These endeavours were not always successful, and several papers which came late in the programme had to be given in too condensed a form to be properly appreciated. This was the case, unfortunately, with the “Note on the Theory of the Michelson-Morley Experiment,” communicated by Principal Hicks. Prof. Morley, who was present, did not feel justified in discussing the question without having further details from Dr. Hicks. It is to be hoped that the debate which arose after the meeting of the Section was over, will lead to a repetition of these important experiments in the light of the new theory.