TRENCH MORTARS. -----------------------------+------------------+-----------------+---------- | Completions to | Completions to | Shipped Character. | Nov. 11, 1918. | Feb. 1, 1919. | overseas. -----------------------------+------------------+-----------------+---------- 3-inch | 1,609| 1,830| 843 4-inch | 444| 778| 6-inch | 368| 500| 48 240-millimeter (9.45 inches) | 29| 30| -----------------------------+------------------+-----------------+---------- TRENCH-MORTAR AMMUNITION. -----------------------------+------------------+-----------------+---------- | Completions | Completions | Shipped Character. | to Nov. 11 | to Feb. 1 | overseas | 1918 (unloaded). |1919 (unloaded). | (loaded). -----------------------------+------------------+-----------------+---------- | _Rounds._ | _Rounds._ | _Rounds._ 3-inch live | 3,136,275 | 3,741,237 | 157,785 3-inch practice | 607,178 | 782,340 | 4-inch gas | | 212 | 4-inch smoke | | | 6-inch live | 292,882 | 492,404 | 240-millimeter (9.45 inches) | 67,829 | 131,124 | -----------------------------+------------------+-----------------+---------- TOXIC GAS SETS. Another extensive project in the trench-warfare program was the manufacture of the so-called toxic gas sets. Each set consisted of a one-man portable cylinder equipped with a nozzle and a firing mechanism. Each set was ready for firing as soon as it was placed in position. In August, 1918, the toxic-gas-set project was taken up by the Trench Warfare Section. Contracts for cylinders were awarded to the Ireland-Matthews Manufacturing Co., of Detroit, Mich., who produced 13,642 cylinders, and to the American Car & Foundry Co. at its Milton, Pa., plant, which concern turned out 11,046 cylinders.