Referee's report by Frederick Alexander Lindemann, Viscount Cherwell, on a paper 'The ignition of gases by electric sparks' by Edward Taylor Jones, J D Morgan and R V Wheeler Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. Suggests the paper should be reduced. Considers the theoretical part not new and the numerical part only of interest for practical applications. Assumes Dugald Clerk 'is of a contrary opinion, and on such a question I should not wish to contradict him'. [Not published] Endorsed on verso as received 8 June 1921. [June 1921]