Referee's report by Robert Robertson, on a paper 'Photographic investigation of flame movements in gaseous explosions. Parts IV, V and VI' by William Arthur Bone and Reginald P Fraser Sectional committee: Chemistry [Report focuses on part VI of the paper]. Recommended for publication in Proceedings. The paper will be expensive to produce and he doubts if it is worth it. Modifications are needed. [Published in Philosophical Transactions A, 1932]. Endorsed on verso as received [August] 1931. 31 July 1931