Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to Messrs. H. Williams and Co., High Holborn, W.C.1 Replies that H. Williams and Co. can expect the Council to give permission for the reproduction of tables IX, and XVIII from Volumes 213 and plate 6 from Vol 215 of Philosophical Transactions, for the book 'Mechanical Refrigeration'; subject to acknowledgements being made and to the consent of the authors, listed as [Charles Frewen] Jenkin and [David Randall] Pye. 21 February 1924