Copy letter from Herbert Rix, to Mr Collings 'Let me have estimate for 4 sheets dias. [diagrams] inclosed herewith; EWAN. "Phil. Trans." ['Philosophical Transactions of the Royal Society']. All to be reduced as much as they will bear, but in Fig. [figure] 2 care must be taken not to obscure the small parts, F, G, I &c. HR'. 18 July 1894