Referee's report by John Henry Poynting, on a paper 'Contributions to the study of flicker. -Paper III' by T C Porter Sectional Committee: Physics and Chemistry Recommended for publication in the 'Proceedings of the Royal Society of London'. The tables are not necessary. Suggests changes to the figures as regards lines and colours used. Suggests changes to the equations. [Published in the 'Proceedings of the Royal Society of London', 1912] Endorsed on verso as received 20 January 1912. [January 1912]