Show fifty hurt in explosion pittsburgh Pitts Pitta burg burgA A terrific explosion oc furred on in the tho offices ot of the columbian Colam blan film exchange in the an eight story structure in the heare of the down town district from fifty to seventy five were injured aminy iny of thein them seriously and the mono iry damage Is 1 estimated at or more first it waa was relieved believed that seven of the HI III n u company b hid bid id icet their lives but this proved untrue A score of 0 the injured vere were taken to hospital hospitals A majority of hom them aro are burned while the others sustained frantu es ol 01 the limbs |