Referee's report by James Chadwick, on a paper 'The absorption of monochromatic X-ray beams, of wave-length in the region 50 to 20 X-units, in lead, tin, copper, and iron' by John Read Sectional Committee: Physics Recommended for publication in the 'Proceedings of the Royal Society of London'. [Published in the 'Proceedings of the Royal Society of London'] Endorsed on verso as received 15 June 1935. [June 1935]