Second letter from David Brunt, to Alfred Charles Glyn Egerton, regarding a paper 'Turbulence and diffusion in the lower atmosphere' by R Frost Sectional Committee: Physics His reasoning for suggesting omitting the second part of the paper are that the formulae used are not valid for the heights investigated, it does not add to the understanding of the physics of the atmosphere, does not provide useful expressions for wind evaluation at different heights, and does not come up to the standards of the first part of the paper, nor the standards expected for the Proceedings. [Published in the 'Proceedings of the Royal Society of London'] No received date. 16 April 1945