Referee's report by Frederick Tom Brooks, on a paper 'On the interactions of two strains of a plant virus; experiments on induced immunity in plants' by John Caldwell Sectional Committee: Botany Recommended for publication in the 'Proceedings of the Royal Society of London'. Suggests some minor alterations, deletions and areas which require clarification. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 1 November 1934. [November 1934]