Silica Plant Damaged by BlastAn explosion fallowed by fire, destroyed the main town, Wis., with a loss estimated by company officials in the building at the time of the blast and they ran to used in processing steel, to defense industries. Officialstiding of the Browntown Siltca company, at Brofj* $150,000 Only two men of u 'normal crew of Wk WWB fety The plant hud been engaged In supplying ilUgp,r« unable to give a cause fur the tlnet