Referee's report by Walter Stiles, on a paper 'The mechanism of the action of the growth substance of plants' by Kenneth Vivian Thimann and James Bonner Sectional Committee: Botany Recommended for publication in the 'Proceedings of the Royal Society of London'. Makes suggested changes to some sentence structure. Suggests omitting the cell wall volume calculations, and associated tables, as these are only approximate results. [Published in the 'Proceedings of the Royal Society of London' B, 1933] Endorsed on verso as received 18 February 1933. [February 1933]