Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Editor of 'Nature'; Messrs. Macmillan & Co. Ltd., St Martin's Street, W.C.2. Informs the Editor, in response to an enquiry, that the Royal Society's Library is largely made up of the Transactions and general scientific periodical literature, and that its purchases are mostly confined to this class of books. 13 October 1923