Referee's report by Joseph Larmor, on a paper 'On the frictional resistances to the flow of air through a pipe' by John H Grindley and A H Gibson Sectional Committee: Physics and Chemistry Recommended for publication in the 'Proceedings of the Royal Society of London'. The paper has been improved under the direction of Horace Lamb. [Published in the 'Proceedings of the Royal Society of London'] [1907]