An old wooden chimney made a huge impression by our inventor Dr. Erwin Thoma during childhood. This strange object was located in a 400 year old farmhouse in Austrian alps and belonged to a friends of his that farmed this mountain side.
The charred wooden chimney started above an open fireplace at the main floor of the house built form wooden beams. The black chimney flue made from larch wood boards went through the ceiling, the 2 bedrooms upstairs passing through and beyond the shingled roof.
The reason was that the particular larch trees which were used to build it were cut at a very specific time according to the phase of the moon. He found this very intriguing and practical at the same time.