Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to [Ralph Howard] Fowler Esq., O.B.E., FRS Forwards an additional page to the paper send by Prof. [Sydney] Chapman ['On the Brownian displacements and thermal diffusion of grains suspended in a non-uniform fluid']. Asks for [Ralph Howard] Fowler to add this to the manuscript when reporting on the paper. 4 February 1928