Show ute use of helium gas air with helium gas content la Is not poisonous to the body says pathfinder magazine one of its important uses la Is to reduce the nitrogen content about four fifths of all air in artificial atmospheres for cor use lo in deep sea diving and other work conducted under heavy atmospheric pressure experiments peri peria ments lents conducted by the bureau of mines show that such an atmosphere enables workers to labor for longer periods under higher pressures in safety and comfort than in an erdl ordinary atmosphere |