Referee's report by George Gerald Henderson, on a paper 'A study of catalytic actions at solid surfaces. Part XIII - Some factors controlling selective hydrogenation, with particular reference to certain terpene derivatives' by Edward Frankland Armstrong and Thomas Percy Hilditch Sectional committee: Chemistry Recommended for publication in Proceedings, in full or slightly condensed. It is a 'valuable contribution to an important subject'. [Published in Proceedings of the Royal Society A, 1925]. Endorsed on verso as received 11 March 1925. March 1925