Show Chemical Melts Big Steel Bridge In One Minute CHICAGO March 2 CP A tJ-A tJ A ton 1200 steel teel traveling crane bridge which required one year to build in 1912 was destroyed Inless in inless inless less than a minute Wednesday by the use of a producing heat-producing chemical compound The demolition of the span feet long 80 feet high and 30 feet wide was accomplished after the compound a powder developed for incendiary bombs which generates a temperature of or degrees In a Jew ew seconds was ignited by an electric current current cur cur- rent lent and melted through the steel supports The bridge then bent slowly the to-the ground The span formerly used to to transport coal from Great Lakes barges to a coal dump has been out of service for tor 18 months All usable iron and steel will be salva salvaged ged |