I received a microfilmed front page Pittsburgh Press article, dated 6 December 1917, detailing a chemical disaster at the Aetna Chemical Plant in Heidelberg on 5 December 1917, but find between 1916 and 1918, there are references to several disasters in the TNT department of this plant.  Could there have been that many explosions with deaths at the same plant in that period of time?  The article has been posted at the Disasters link on the Carnegie Website.  Any help sorting this out will be very appreciated.         My particular interest in this disaster is the death of Ellis LEA, husband of a cousin, Beatrice NORRIS Lea Bryan.       Betsy (Norris) Banzen       Venice, FL