Referee's report by George Frederick Charles Searle, on a paper 'Determinations of the fundamental standards of length in terms of wave-lengths of light' by J E Sears, Junr. and H Barrell Sectional Committee: Physics Recommended for publication in the 'Philosophical Transactions of the Royal Society'. 'It follows that any comparison between wave length and metre is useless for the purposes of practical life unless there is a full record of the number of waves'. The paper cannot be shortened without loss of value. [Published in the Philosophical Transactions of the Royal Society A, 1934] Endorsed on verso as received 22 January 1934. [January 1934]