Referee's report by Michael Polanyi, on a paper 'The CH2:CH.CH2-CH3 bond dissociation energy and the heat of formation of the allyl radical' by A H Sehon and Michael Szwarc Sectional committee: Chemistry Paper reference code: A33 Recommended for publication in Proceedings: 'It is an important contribution to the new picture of chemical bond-energies which M Szwarc is setting out through his investigation.' [Published in Proceedings A, 1950]. Date received not given. 2 March 1950