Referee's report by Ralph Howard Fowler, on a paper 'The interaction of atoms and molecules with solid surfaces I—The activation of adsorbed atoms to higher vibrational states' by John Edward Lennard-Jones and C Strachan Sectional committee: Mathematics Recommended for publication in Proceedings, in full. [Published in Proceedings of the Royal Society A, 1935]. Endorsed on verso as received 17 January 1935. January 1935