Under normal conditions, in accordance with the law of supply and demand, prices tend to rise coincidentally with the enhanced manifestation of request, but the country took steps to protect the consumer, and at the same time to remunerate the producers adequately. Whereas the pre-war price for this fertilizing agent ranged from £12 10s. to £14--$62.50 to $70--per ton, the war price was officially fixed at £16--$80--per ton. Inasmuch, however, as the controlled quotation included transport and delivery charges, the actual increase in the cost was not appreciable. But it was the 1917-18 season which revealed the circumstance that the virtues of sulphate of ammonia at last had really gripped the British farmer. From the estimates which were carefully prepared the requirements were set down at 220,000 tons. As a matter of fact they notched 230,000 tons. Thus, in two short years, the consumption of sulphate of ammonia by the hungry soil of Britain was quadrupled, a really startling achievement. The total output of this commodity, both in the solid and liquid forms, reached a round 400,000 tons, and to-day stands at about 460,000 tons. Approximately, one-half of this aggregate is forthcoming from our gas-works and the other half from our coking-ovens and blast-furnaces. During the war the balance remaining after the needs of agriculture had been met, namely 170,000 tons, was absorbed in the manufacture of munitions. But under restored peace conditions this latter volume will be rendered available for home consumption or export. Seeing that our pre-war export figure was 323,054 tons a year, it would seem as if we are destined to lose some of our revenue from this trade. Obviously only about 170,000, or at the utmost, 230,000 tons will be available for our foreign customers. It would seem as if we are certain to fall a round 100,000 tons short of their actual needs, which will certainly be equal to the ante-bellum figure. As a matter of fact the demand will probably be much heavier, considering that the land of these customers has been denied this food for nearly five years; at least supplies have only been forthcoming in small and totally inadequate quantities. Moreover, the home demand is rising still, which must tend to attenuate the quantities available for export.