Copy letter from Archibald Geikie, to Professor Henri Moissan, [Fellow of the Royal Society] The fresh volumes of Mossian's valuable 'Traite de Chimie Minerale', which he has kindly presented to the Royal Society in continuation of those already sent have arrived, and Moissan can assure Geikie that the Society much appreciates the mark of his consideration. 2 October 1905