During June last I visited the Fullers Earth Pits at Nutfield, near Redhill, Surrey, with the London Geological Field Class, when Professor Seeley suggested to me that I should make an analysis of the deposit. This I have been enabled to do through the kindness of the manager (A. Sheridan, Esq.), who was good enough to send me a series of samples of the earth, and the various products prepared from it. The Nutfield Fullers Earth is a heavy blue or yellow clay, with a greasy feel and an earthy fracture. The sample No. 1 contained 27·47 per cent. and No. 2, 29·56 per cent. of water before drying.