Letter from L. O. Howard, American Association for the Advancement of Science, Washington D. C, to Mr Robert Harrison, Assistant Secretary, Royal Society, Burlington House, London Acknowledges receiving his dated 22 February and assures that the missing volumes of their proceedings will be sent promptly. Expresses a willingness to continue the exchange and requests that future volumes be addressed to them as the Permanent Secretary at the Smithsonian Institution in Washington, D.C. 6 March 1908