Referee's report by David Leonard Chapman, on a paper 'The constitution and formation of bleaching powder' by Charles William Bunn, L M Clark and I L Clifford Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. The paper may slightly exceed the 24 page limit. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 5 March 1935. [March 1935]