Referee's report by George Frederick Temple, on a paper 'Relaxation methods applied to engineering problems. XIV. Plastic straining in two-dimensional stress systems' by D N De G Allen and Richard Vynne Southwell Sectional committee: Engineering Recommended for publication in Philosophical Transactions. It is an important application of relaxation technique. Some small modifications could be made. [Published in Philosophical Transactions A, 1950]. Date received not given. 1949