Referee's report by John Cunningham McLennan, on a paper 'The change in the absorption spectrum of cobalt chloride in aqueous solution with increasing concentration of hydrochloric acid' by Owen Rhys Howell and Albert Jackson Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. [Published in the 'Proceedings of the Royal Society of London' A, 1933] Endorsed on verso as received 12 July 1933. [July 1933]