Referee's report by Percival Hartley, on a paper 'The selective admission of antibodies to the foetus by the yolk-sac splanchnopleur in rabbits' by Francis William Rogers Brambell, W A Hemmings, Megan Henderson and W T Rowlands Sectional committee: Physiology Recommended for publication in Proceedings. The meanings of some of the terms should be defined. [Published in Proceedings of the Royal Society B, 1950]. Date received not given. 1949