Referee's report by Patrick Maynard Stuart Blackett, Baron Blackett of Chelsea, on a paper 'On the analysis of cosmic rays' by Walter Heinrich Heitler Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. Suggests some minor points for editing. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 29 April 1937. [April 1937]