| Show IRON SUPPLY SUPPLY OF WORLD MENACED CHICAGO July Bat 1 1 M Bat Battling tUng rust and corrosion costs coats ap- ap approximatelY approximately ap approximately proximately two and a halt half billion dollars a year according to W J f superintendent of the DuPont Company of ot Chicago This sum Bum spent annually to counteract the ravages of corrosion and rust will give gise e a fair Idea ot of the total bill the tho world Is le paying for the slow decay of ot metals used In Industrial work which are not protected against them he declared de- de declared de declared It Is a n vital tal matter because be- be because be because cause the i yearly early waste Is to making the Iron ore resources of the world exhaustible within a IJ measurable distance of ot time |