Referee's report by Charles Galton Darwin, on a paper 'A theory of some electron-levels in H2' by J K L MacDonald Sectional Committee: Mathematics Recommended for publication in the 'Proceedings of the Royal Society of London'. The paper should not be shortened. Suggests using the term 'Rayleigh variation' rather than 'Ritz variation'. Wonders if this is a question that should be taken up by the Royal Society. [Published in the 'Proceedings of the Royal Society of London' A, 1932] Endorsed on verso as received 12 February 1932. [February 1932]