Referee's report by Charles Galton Darwin, on a paper 'The collision of slow electrons with atoms. I.—General theory and elastic collisions' by Harrie Stewart Wilson Massey and C B O Mohr Sectional committee: Mathematics Recommended for publication in Proceedings, in full. It is a 'very good piece of work' and the changes from the earlier work are sufficient enough to justify publication. It could be shortened. [Published in Proceedings of the Royal Society A, 1932]. Endorsed on verso as received 20 January 1932. January 1932