Show factories mare make poison gas the most effect effective ivo poison gases knoma ow ii are in intermediate term ed into products in the manufacture of many common dyes cosmetics and drugs you have only to le leave ave partially completo tairi process for making indigo and you have the most deadly of polain gases games mustard gas more poison gas Is being manufactured and used today in tile united states wits was used at any time during til the 0 wr war s anys ys gen ell amos A virles fries chief of tile the elle chemical mical warfare service in magazine |