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Show Use Dry Ice Instead of Powder in Militia Guns DENVER. Col. Clyde E. Hill, commander of the Colorado defense force, has announced that the unit will be armed with "dry ice" guns to replace the Springfield rifles taken tak-en over by the army. Hill explained that the new weapon weap-on is powered by gas from dry ice which propels a bullet with the same velocity as a powder-burning cartridge. car-tridge. Ray J. Monner, Denver, designed the dry ice gun which he said had been demonstrated to the war department. de-partment. The rifle shoots a .22 caliber bullet. bul-let. Its operation is based on the fact that gas evaporating from solid carbon . dioxide (dry ice) exerts about 1,170 pounds of constant pressure pres-sure per square inch in the gun's magazine. A trigger opens a valve, releasing releas-ing the gas pressure and discharging discharg-ing the bullet. One loading of dry ice, Monner said, would fire 1,800 rounds of ammunition. m |