Referee's report by William Edward Curtis, on a paper 'Isotope shift in the resonance line of magnesium' by Derek Ainslie Jackson and H Kuhn Sectional Committee: Physics Recommended for publication in the 'Philosophical Transactions of the Royal Society'. Suggests cutting the paper down, including removing the description of the method, which has been published previously in the Proceedings. Finds some of the information difficult to interpret. [Published in the Philosophical Transactions of the Royal Society] Endorsed on verso as received 20 January 1936. [January 1936]