Curling Rink Is Destroyed by FirePortage—-The curling rink* and auditorium of the Portage Curling club, site of many bon-spiels in former years, wa* destroyed by fire early today.David Bogue, cly£ president, said cause of the fire which resulted in damage estimated at 520,000, pax't-ly covered by insurance, had not been determined.The rink, one of the largest in Wisconsin, was the home of the Wisconsin Curling association and could accommodate seven games at one time.