Show fifty hurt in exolus on pittsburg A terrific explosion oc burred on monday in the offices of the columbian film exchange in the berguson erguson building an eight stor structure in the heart of 0 the down town district from fifty to seventy five persona persons were injured many ol 01 0 them seriously erious ly and the mone ary damage is estimated at or more iii 11 st it was believed that seven employed emp loyes of the film company had lost their lives bit b it this proved untrue A score of the injured taken to hospitals A majority ot of them are burned while the others sustained fractures of the limbs |