Referee's report by Robert Robertson, on a paper 'The infra-red absorption spectra of quartz and fused Silica from 1 to 7·5 µ I-Experimental method' by D G Drummond Sectional committee: Physics The paper is too detailed and the level of detail on this subject is unnecessary. The calibration by carbon dioxide tubes is described in too much detail. [Published in Proceedings of the Royal Society A, 1936]. Endorsed on verso as received 1 August 1935. 30 July 1935