Copy letter from Francis Alexander Towle, Assistant Secretary of the Royal Society; to the Secretary, the Farday Society, 90 Great Russell Street, WC1 Informs that the Printers of the Royal Society, Harrison & Sons, have been written to loan the block of figure 10 from the paper by Mr. R. W. Fenning in Transactions Vol. A.225. ['VIII. Gaseous combustion at medium pressures. Part I. —Carbon monoxide air explosionsin a closed vessel. Part II. —Methane-air explosions in a closed vessel.'] Asks for the block's return once the Faraday Society is finished. 22 April 1926