Referee's report by George William Clarkson Kaye, on a paper 'A standard source of sound and the measurement of minimum audibility' by Edward Neville Da Costa Andrade and R C Parker Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. Part five should be shortened, although if the authors believe the apparatus warrants a full description, this should be done as a separate paper in a more suitable journal. Reference should be made to the work of Sivian and White. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 31 December 1936. [December 1936]