Referee's report by John Frank Allen, on a paper 'Ultrasonic measurements in liquid helium' by C E Chase Sectional committee: Mathematics Paper reference code: A132 Recommended for publication in the Proceedings. Allen writes: The style is admirable. I have no adverse comments to make. The only error visible is the omission of the description of the ordinate in Fig 4'. [Published in Proceedings A, 1953]. Date received not given. 28 June 1953