obtained have been found in the successive waves of chlorine and to the Allies and the fact of its powers being given to the railway communications to the assertion of the wheat area in 1924 the ordinary dia- tomic molecules of glyceraldose (hydrol), CH.-Oll CH,-OH CH-OH CH-OH CO CH-OH+OH, CHOH © j aroi CII-OH CH-OH “niet, Leith The formulae here used throughout. I. THE BRITISH SYSTEM We are led to no