Letter from W [William] Ramsay, University College, Gower Street, to [Joseph] Larmor He asks if he must give an answer at once, as he has much work before he can publish. Ramsay has been working with his students on an ore from Ceylon [Sri Lanka] which should have contained radium. He describes the radioactivity of its sulphate residue, and a programme of precipitating and crystallising from resulting solutions. This eventually gives a precipitate with two emanations, one identical with thorium, but of a much greater emanation. He is beginning experiments ot elucidate matters. He has also worked with the mineral malacone which gives off argon when decomposed. He therefore has a lot of results which require explanation. He asks for advice, thinking that he should decline to lecture, as not deserving a place in Philosophical Transactions at that time. 24 January 1905