Referee's report by William Lawrence Bragg, on a paper 'X-ray studies of the structure of hair, wool, and related fibres.- I. General' by W T Astbury and A Street Sectional committee: Physics Recommended for publication in Proceedings, in full. The paper should be reduced in size, as it 'breaks new ground' and should be published in full. [Published in Philosophical Transactions A, 1932]. Endorsed on verso as received 22 September 1930. September 1930