Referee's report by Herbert John Gough, on a paper 'Physical properties of surfaces I - Kinetic friction' by Frank Philip Bowden and W G Beare Sectional committee: Engineering sciences Recommended for publication in Philosophical Transactions. Tomlinson's paper on 'A Molecular Theory of Friction' is not mentioned but this is an important contribution to this subject. The paper should be condensed in places. [Published in Philosophical Transactions A, 1935]. Endorsed on verso as received 27 July 1934. 25 July 1934