Referee's report by William Henry Bragg, on a paper 'On the ionisation of gases by collision and the ionising potential for positive ions and negative corpuscles' by W I Pawlow Sectional Committee: Physics and Chemistry Recommended for publication in the 'Proceedings of the Royal Society of London'. The paper could be shortened by abbreviating the description of the apparatus, but this is not essential. Suggests a change to the order of the references, but this should only be drawn attention to if offence could be avoided, which is doubtful. [Published in the 'Proceedings of the Royal Society of London', 1914] Endorsed on verso as received 1 May 1914. [May 1914]