| Show Empty Tanks Dangerous gasoline tanks are arc always more dangerous dangerous dangerous dan dan- F EMPTY than full ones In most cases some residue remains in the tank or can The remaining gasoline vaporizes ana is explosive AB A 4 s R the tank is being filled this mixture is forced out and will explode if ignited by a spark held near the opening To guard against accidents a writer in Popular Popular Popular Pop Pop- ular Science Monthly suggests that all openings should be blown out with compressed air If this method cannot be used the cover should be removed removed removed re re- re- re moved and the vapors fanned out Unless a current current current cur cur- rent of air is circulating gasoline should never be used for cleaning engines or other machinery and if air is passing pasing lights should be kept at a safe distance on the intake side of the tho engine |