Referee's report by John Edward Lennard-Jones, on a paper 'The absorption spectra of complex molecules. Part I. The theoretical calculation of the critical frequencies of a molecule' by Samuell Francis Boys Sectional committee: Mathematics Not recommended for publication. The problem the paper attempts to deal with is much more complicated than the author makes it seem. The interaction of electrons needs to be considered in a more detailed way. [Published in Proceedings of the Royal Society A, 1925]. Endorsed on verso as received 29 July 1935. 26 July 1935