Referee's report by John Rose Bradford, on the Croonian Lecture 'Immunity with special reference to cell life' by Paul Ehrlich Sectional committee: Physiology Recommended for publication in Proceedings, in full. The illustrations aren't essential. The paper should be printed in the Proceedings because it consists rather of a summary of Ehrlich's views of the nature of immunity rather than a round up of the data on which these views are founded and because a considerable portion of the contents of the paper has already been published. [Published in Proceedings of the Royal Society, 1899]. Endorsed on verso as received 11 May 1900. May 1900