Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; Dr [Joseph William] Mellor, Sandon House, Regenst Street, Stoke-on-Trent. Informs that [Joseph William] Mellor can expect permission to be given to reproduce figures 21 and 24 from the papers by Sir Alfred Ewing and Dr [Walter] Rosenhain [VIII. The crystalline structure of metals. (Second paper.)] in the Philosophical Transactions Vol. A 193 for his Treatise on Inorganic Chemistry. States that the permission is subject to acknowledgements being made. 13 March 1924