Referee's report by Charles Galton Darwin, on a paper 'The angular momentum of a photon' by G Temple and E C Rust Sectional committee: Mathematics Another referee should be used, such as Dirac. He is unable to agree with most of the paper but has not noticed any errors. The work is 'formally right' but the results 'have only a formal significance and it is probable that to trace out the trouble would lead to interesting results'. Two different tenses are used throughout the paper which should be changed. His response to this paper has been delayed, since he was in America. [Not published]. Endorsed on verso as received 1 May 1931. May 1931