Referee's report by William Harold Joseph Childs, on two papers 'Investigations on the vibration spectra of certain condensed gases at the temperature of liquid nitrogen I. Experimental methods A. Infra-red spectra' by G K T Conn, E Lee, Gordon Brims Black Mcivor Sutherland and Ronald George Wreyford Norrish and 'Investigations on the vibration spectra of certain condensed gases at the temperature of liquid nitrogen II. The infra-red and Raman spectra of hydroand deuterochloric acid at liquid nitrogen temperatures' by E Lee, Gordon Brims Black Mcivor Sutherland, Cheng-kai Wu and Ronald George Wreyford Norrish Sectional committee: Physics Recommended for publication in Proceedings. The papers are an adequate description of research that should be publihsed as they stand. They don't bring forward new material and so aren't suitable for reading at a meeting of the Society. Some modifications are required. [Both papers published in Proceedings of the Royal Society A, 1940]. Endorsed on verso as received 19 June 1940. June 1940