Referee's report by Sydney Chapman, on an appendix to a paper 'An investigation of the flow of air an aerofoil of infinite span' by Geoffrey Ingram Taylor, L W Bryant and D H Williams Sectional committee: Mathematics Recommended for publication in Philosophical Transactions, in full [Published in Philosophical Transactions A, 1926]. Appendix has been added to the published paper under the heading 'Note on the connection between the lift on an aerofoil in a wind and the circulation round it'. Endorsed on verso as received 27 June 1925. June 1925