Referee's report by Kenneth Mather, on a paper 'Cytogenetic analysis of the action of carcinogens and tumour inhibitors in Drosophila melanogaster. I. 1:2 3:4 diepoxybutane' by Myrtle J Bird and O G Fahmy Sectional committee: Physiology Paper reference code: B12 Recommended for publication in the Proceedings. Mather's minor comments, and remarks on 'whether the detailed differences in distribution of the 123 diepoxybutane lethals and the 83 mustard gas lethals along the genetical map of the X chromosome'. [Published in Proceedings B, 1953]. Date received not given. 24 March 1952