Referee's report by Charles Galton Darwin, on a paper 'Resistivity of pure metals at low temperatures. I. The alkali metals' by David Keith Chalmers Macdonald and K Mendelssohn Sectional committee: Physics Paper reference code: A13 Recommended for publication in Philosophical Transactions. Suggest some figures 'are not very useful' but ultimately that 'the paper is well written without undue length and may be accepted as it stands.' [Published in Proceedings A, 1950]. Date received not given. 1950