Referee's report by George Udny Yule, on a paper 'A quantitative study of the course of fungal invasion of the apple fruit and its bearing on the nature of disease resistance.—Part I. A statistical method of studying fungal invasion' by F G Gregory and A S Horne Sectional committee: Botany Not recommended for publication, until it has undergone come 'drastic revision'. There are some errors in the paper, which the referee points out, [Published in Proceedings of the Royal Society B, 1928]. Endorsed on verso as received 12 May 1927. 18 April 1927