Nearly 1,400 tons of phosgene, chlorpicrin, mustard, and other deadly gases made during the war are now stored at Edgewood; and to-day, nearly three years after the armistice, their containers are still in almost perfect condition. It is estimated that they will not deteriorate in storage for at least ten years, a fact indicating that poison gases are as durable in storage as smokeless powder. There are also stored at Edgewood large quantities of loaded gas shell manufactured during the war. These are frequently inspected and tested, and the tests show that they are keeping well. The experts now estimate that loaded gas shell will exist in good condition as long as a battleship can give service, from the time of commissioning the ship to the time when it is declared obsolete. Other reserves of chemical warfare equipment now stored at Edgewood include 51,000 Livens projectors, 88 trench mortars, 3,000,000 unfilled gas shell, and 700,000 unfilled hand grenades. There are also in storage over 2,000,000 gas masks and 1,000 tons of activated charcoal for use as a gas absorbent in the mask canisters. The masks are stored in hermetically sealed boxes, a method of preservation which, it is hoped, will protect the rubberized fabric from deterioration for years to come. Other stored supplies include protective suits, protective ointment, and gas alarm devices. Such chemicals as the Chemical Warfare Service did sell after the armistice brought good prices. The prices of many chemicals went up after the armistice, and the Chemical Warfare Service profited accordingly. The Service made a profit of 100 per cent on the phosgene it sold and also found a good market for its chlorine. Among the reserves stored at Edgewood was a considerable quantity of the felt which was developed by Americans as a protection against arsenical smoke, a deadly chemical never given a trial in the field of battle, but regarded as an inevitable development in the expected campaign in 1919. The production of toxic smoke was one of the most interesting phases of the history of chemical warfare in the World War. The candles which projected this smoke were perhaps the most appalling weapon devised by any of the belligerents during the conflict, and the armistice interrupted an Anglo-American project, well under way, to asphyxiate the Germany Army with them in the spring of 1919. This development was one of the deepest military secrets both in England and the United States. Except for the French, not even the other Allies were admitted to the secret.