Referee's report by Douglas Rayner Hartree, on a paper 'The diffraction of electrons by graphite' by George Ingle Finch and H Wilman Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. Suggests clearly defining the term 'reflection pattern', and clarifying the obscure interpretation thereof. The method of indexing the Kikuchi lines should be clarified. Comments on the numbering of the figures. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 25 February 1936. [February 1936]