THE announcement in NATURE of June 3 of the death of Sir Arthur Herbert Church, in his eighty-first year, has been received with great regret among men of science. Sir Arthur Church was educated at King's College, London, the Royal College of Chemistry, and Lincoln College, Oxford, where he took a First in the Natural Science School. He afterwards became Professor of Chemisty in the Royal Agricultural College, Cirencester. This appointment naturally led him to devote special attention to agricultural chemistry, on which he became an authority, and at the same time to direct his attention to the chemistry of plants. He contributed memoirs on vegetable albinism; colein or erythrophyll; and aluminium in vascular cryptogams, etc., and also investigated the remarkable animal pigment known as Turacin, which contains 7 percent, of metallic copper.