Referee's report by Cecil Reginald Burch, on a paper 'The concept of partial coherence in optics' by H H Hopkins Sectional committee: Physics Paper reference code: A53 Recommended for publication in the Proceedings. Burch remarks he does not completely understand Hopkins paper, but more in a 'general way'. [Published in Proceedings A, 1951]. Date received not given. 6 March 1951