Letter from Geoffrey Ingram Taylor, on a paper 'Radially symmetric phase growth controlled by diffusion' by Frederick Charles Frank to D C Martin, Assistant Secretary of the Royal Society His criticism of the paper was based on a misunderstanding for which the author was responsible. He introduced the the word 'impurity' without previous explanation. This is an 'abuse of language', but there is perhaps no point in raising objection to this, as it is a 'matter of taste'. He has no further objections to publication. [Published in Proceedings of the Royal Society A, 1950]. Endorsed on recto as received 14 January 1950. 13 January 1950