Copy letter from AH White, Assistant Librarian of the Royal Society; to Dr JN Pring, MBE, Electrical Chemical Laboratories, the University, Manchester Advises that the blocks Dr JN Pring has requested are still available. While they do not lend blocks, authors can have electros of them at their own cost. They will proceed if he applies to have permission to reproduce at his own cost, quoting the paper and the blocks and the publication he wishes to reproduce them in. Requests when they are published it says that they are reproduced 'by permission of the Royal Society's Proceedings.' 23 January 1920