Referee's report by William Henry Bragg, on a paper 'X-Ray crystallography and the chemistry of the steroids. Part I' by John Desmond Bernal, Dorothy Mary Crowfoot Hodgkin and I Fankuchen Sectional Committee: Physics Recommended for publication in the 'Philosophical Transactions of the Royal Society'. The paper is long and useful. 'There is the question of possible assistance to the enemy. All organic chemistry is liable to be cleared [?] as of possible use, but this is pretty far off present usefulness'. [Published in the Philosophical Transactions of the Royal Society] Endorsed on verso as received 23 April 1940. [April 1940]