Copy letter from Herbert Rix, to Dr John Hopkinson, Fellow of the Royal Society *half a dozen lines might do if you give the references to your previous three papers - H.R. [Herbert Rix] Dear Sir, Lord Rayleigh directs me to say that it would be convenient to have a *short abstract of your paper, referring, if you like, to "the three short papers" already published. I am, yours faithfully, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 17 April 1889