An early morning explosion ripped through the Penn Treaty Iron Works on Beach Street in Philadelphia when a boiler exploded.  Thanks perhaps to the early hour only one man killed and several others injured.  Fortunately, a water tank was overturned in the incident and doused completely any possible resulting fire.  (By John Osborne) 
Source Citation
              "Terrific Explosion in Philadelphia," Chicago Tribune, December 1, 1865, p. 1.