Second referee's report by Geoffrey Ingram Taylor, on a paper 'A crystallographic investigation of glacier structure and the mechanism of glacier flow' by Max Ferdinand Perutz and Gerald Seligman Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. The paper has been shortened and thoroughly revised, and meets the criticisms of form in his earlier report. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 19 June 1939. [June 1939]