Referee's report by Francis Hugh Adam Marshall, on a paper 'On the occurrence of the oestrous cycle after X-ray sterilisation. Part IV.–Irradiation of the adult during pregnancy and lactation; and general summary' by Alan Sterling Parkes Sectional Committee: Physiology Recommended for publication in the 'Proceedings of the Royal Society of London'. Has made some minor corrections for the author's consideration. [Published in the 'Proceedings of the Royal Society of London' B, 1927] Endorsed on verso as received 13 June 1927. [June 1927]