References:
http://www.fao.org/docrep/x5328e/x5328e06.htm
http://www.fao.org/docrep/x5555e/x5555e03.htm
http://www.fao.org/docrep/x5328e/x5328e05.htm
http://www.bbc.co.uk/schools/gcsebitesize/science/aqa/heatingandcooling/heatingrev5.shtml
https://www.youtube.com/watch?v=O-R-8OPRJz4
[small correction - the thin sticks that are put into the "oven" are freshly cut a few minutes before, have all their bark peeled to reveal the green wood, and are NOT dried before they go in the tin.]
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