JamesRayKenney and Scafool, Thanks for this info. I always like to know how things work, as well as if they work. As you say, knowing how they work makes it easier to make them work.
Yes, it was a revelation to me, when I found out that wood(and most other things), does not burn, but that the GASES emitted by heated wood is what does the burning...
It makes a lot of the 'tricks' of fire making make a LOT more sense!