Referee's report by Albert James Bradley, on a paper 'X-ray structure and elastic strains in copper' by S L Smith and W A Wood Sectional committee: Physics Recommended for publication in Proceedings. It is of 'fundamental importance'. Contains extra question - 'Is there any information contained in the paper which likely to be of value to the enemy?' Referee replies no. [Published in Proceedings of the Royal Society A, 1940]. Endorsed on verso as received 8 July 1940. July 1940