Referee's report by Charles Galton Darwin, on a paper 'On the interaction of two particles' by H R Hulme Sectional Committee: Mathematics Recommended for publication in the 'Proceedings of the Royal Society of London', although the paper is marked for the Philosophical Transactions. Refers to work of Muller, on whose work the current paper expands. Suggests the addition of a summary. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 6 January 1936. [January 1936]