Copy letter from Herbert Rix, to the Editor, 'Philosophical Magazine' The Royal Society's printer sent yesterday a proof of Lord Kelvin's [William Thomson's] paper to be read before the Royal Society on 28 April. They have not had time to get a block cut for the figure and suppose the 'Philosophica Magazine' will be making a cut and should be glad to borrow the block or have a cliché. 8 April 1892