Referee's report by Horace Tabberer Brown, on a paper 'The effect of plant growth & of manures upon the soil: the retention of bases by the soil' by A D Hall and N H J Muller Sectional Committee: Botany Recommended for publication in Philosophical Transactions, in full and no modifications are required. The two curves accompanying the paper should be included. The paper is an important contribution to Agricultural Science. [Published in Proceedings of the Royal Society B, 1905]. Endorsed on recto as received 5 June 1905. 2 June 1905