Referee's report by William George Penney, on a paper 'The atomic heats of the rare earth elements' by D H Parkinson, Franz Eugen Simon and F H Spedding Sectional committee: Chemistry Paper reference code: A243 Recommended for publication in the Proceedings. Penney remarks it is an 'excellent' paper and suggests the authors are invited to present their results. [Published in Proceedings A, 1951]. Date received not given. 5 January 1951