Referee's report by Owen Willans Richardson, on a paper 'Wave- length standards in the first spectrum of krypton' by C V Jackson Sectional Committee: Physics Recommended for publication in the 'Philosophical Transactions of the Royal Society'. Encloses letter to Sir Frank Smith. Suggests giving an explanation as to why the wavelength values in the current paper are different to those in the earlier one. Refers to work by Buisson, Fabry, Derek Ainslie Jackson, Kuhn and Williams. Suggests including photographs rather than line spectra. [Published in the Philosophical Transactions of the Royal Society] Endorsed on verso as received 12 February 1936. [February 1936]