Referee's report by Charles Galton Darwin, on a paper 'The supersonic flow of compressible fluid through axially symmetric tubes of uniform and varying section' by R K Tempest Sectional committee: Physics Recommended for publication, after it has been re-written. The introduction 'puts the matter rather the long way round'. He should communicate his finding in another way. The end seems quite inconclusive so should be re-written. [Published in Proceedings of the Royal Society A, 1950]. Date received not given. 1949