Response to referee by Alfred Fowler, on a paper 'Wave- length standards in the first spectrum of krypton' by C V Jackson Sectional Committee: Physics The referee's remarks are on points of no great importance. The difference between the current paper and the previous one are small, but the author has overestimated the accuracy of the first results. Agrees with the author that the wavelengths will be more useful than photographs of ring systems. Refers to work by Derek Ainslie Jackson and H Kuhn. [Published in the Philosophical Transactions of the Royal Society] Endorsed on verso as received 14 March 1936. 13 March 1936