Obituary notices: John Young Buchanan, 1844–1925; Giacomo Luigi Ciamician, 1857–1922; Samuel Henry Davies, 1870–1925; William Henry Deering, 1848–1925; Francis Robert Japp, 1848–1925; Francis Jones, 1845–1925; Edmund Knecht, 1861–1925; William Robert Lang, 1870–1925; Frank George Pope, 1867–1925; Charles Etty Potter, 1880–1925; Robert Llewellyn Taylor, 1851–1925; Sir Edward Thorpe, 1845–1925