From: moroney@world.std.spaamtrap.com   
      
   Let's say I have a sealed but vented chamber filled with natural gas or propane   
   or something (no air/oxygen in it). Also in the chamber is a Bunsen burner.   
   I connect the Bunsen burner to a tank of oxygen or air. At the same time I   
   turn on the oxygen/air I start an electric spark at the burner so oxygen   
   doesn't   
   build up and cause an explosion.   
      
   Do I get a flame? It will be oxygen "burning" in an atmosphere of methane or   
   propane.  Would such a flame be normal or unusual/strange in some way?   
      
   Also assume methane/propane is resupplied in excess and pressure relieved   
   so ignore build up of combustion products.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)