Referee's report by Ralph Howard Fowler, on a paper 'The determination of molecular forces from the viscosity of a gas' by H R Hasse and W R Cook Sectional committee: Mathematics Recommended for publication in Proceedings, in full. The experiments are worth doing and have been done well. [Published in Proceedings of the Royal Society A, 1929]. Endorsed on verso as received 27 June 1929. June 1929