Referee's report by Charles Herbert Lees, on a paper 'A new form of interferometer' by H P Waran Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. Refers to work of John William Strutt, 3rd Baron Rayleigh and Koliick [?]. [Published in the 'Proceedings of the Royal Society of London' A, 1922] No received date. [1921]