COMMERCIAL poultry-rearing has reached a high state of efficiency, and part of that efficiency is expressed in a standardized ration, in which only food ingredients are used which have been proved to be best suited fox their purpose. TJnder war conditions the accustomed standardized ration must be given up, since the amount and nature of feeding stuffs available for livestock becomes restricted, partly because of a reduction in imported supplies and partly because of the wider use of home-grown cereals for human consumption. Poultry-keepers are urged to exercise the greatest economy in the use of such imported materials as maize, and in order that the accustomed ration may be replaced by satisfactory substitutes the Ministry of Agriculture and Fisheries has issued, as one of its “Growmore” Leaflets (No. 14), a summary account of materials which may be used in rearing, growing or breeding rations. The list includes thirty-one different food materials, and the feeding value and method of using each stuff is stated briefly. Single copies of the leaflet—“Poultry Rations in War Time”—may be obtained free of charge and post paid on application to the Secretary, Ministry of Agriculture and Fisheries, 10 Whitehall Place, London, S.W.I.