Show U. U S. S Helium Supply Adequate for lor Defense WAS W WASHINGTON Despite HINGTON-Despite Despite the production last year of over cubic feet of light helium gas s from the govern govern- meats menta plant at Amarillo Texas an adequate supply SUI of ot the tile valuable gas gu for tor purposes of ot national defense de de- tense remains for a long time to come says saya the annual report of ot the secretary of ot th the Interior The United States holds bolds a virtual monopoly monopoly mo mOo In the world on OD the production production tion of ot helium pas gas Studies l by y the United States bureau bureau bu hn- reau of ot mines on the rock pressure of ot the gas In the field Indicate that only slightly more than 2 per ler cent of the gas cas reserve has been used Oled In the six years of ot operation of ot the plant |