Copy letter from Herbert Rix, to Messrs Harrison & Sons 'Dear Sirs, Please supply cliches with account for the same to Capt. [Captain William de Wiveleslie] Abney as follows:- The cuts illustrating his paper on "Colour Photometry Part III." (Phil. Trans. ['Philosophical Transactions of the Royal Society'] vol. 183); Cuts in his paper "On Examination for Colour of Cases of Tobacco Scotoma" (Proceedings [of the Royal Society], vol. 49); The two cuts in the Report of the Colour Vision Committee ("Proceedings", vol. 51); Fig. [Figure] 1 in "Colour Photometry, Part I" (Phil. Trans., vol. 177); and the last figure in Section 26, p. 455 of the same paper. Yours truly, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 4 July 1894