Referee's report by Walter Rosenhain, on a paper 'On the correlation of the chemical constitutions of "true steel" to their micrographic structures' by John Oliver Arnold Sectional Committee: Physics Not recommended for publication in the 'Proceedings of the Royal Society of London'. The paper contains no new material, instead being a summary of previously published information. [Not published] Endorsed on verso as received 2 February 1922. [February 1922]