Referee's report by James Walker, on a paper 'The origin of osmotic effects. IV.—Hydronodynamic change in aqueous solutions' by Henry Edward Armstrong Sectional Committee: Chemistry Recommended for publication in the 'Proceedings of the Royal Society of London'. Finds it difficult to accept many of the conclusions. [Published in the 'Proceedings of the Royal Society of London' A, 1923] Endorsed on verso as received 15 November 1923. [May 1923]