Referee's report by Charles Galton Darwin, on a paper 'Resistivity of pure metals at low temperatures. II. The alkaline earth metals' by David Keith Chalmers MacDonald, Kurt Mendelssohn and Franz Eugen Simon Sectional committee: Physics Paper reference code: A49 Recommended for publication in Proceedings: 'It is not very long and can be accepted with its diagrams.' [Published in Proceedings A, 1950]. Date received not given. 1950